Same problem here, GPhoto, Pentax Native and Pentax Legacy crashes.
My K-70 is in PTP mode, but it doesn't matter whether it's in PTP or MSC mode, same issue.:

[2020-08-22T12:55:34.662 CEST DEBG ][ org.kde.kstars.ekos] - Resetting Ekos Manager...
[2020-08-22T12:55:34.675 CEST INFO ][ org.kde.kstars.ekos] - "Starting INDI services..."
[2020-08-22T12:55:34.675 CEST DEBG ][ org.kde.kstars.indi] - INDI: Starting local drivers...
[2020-08-22T12:55:34.676 CEST DEBG ][ org.kde.kstars.indi] - Starting INDI Server: ("-v", "-p", "7624", "-m", "300", "-r", "0", "-f", "/tmp/indififo80f508b8") -f "/tmp/indififo80f508b8"
[2020-08-22T12:55:34.680 CEST DEBG ][ org.kde.kstars.indi] - INDI Server Started? true
[2020-08-22T12:55:34.680 CEST DEBG ][ org.kde.kstars.indi] - INDI: INDI Server started locally on port 7624
[2020-08-22T12:55:34.680 CEST DEBG ][ org.kde.kstars.indi] - Starting INDI Driver "indi_pentax"
[2020-08-22T12:55:34.680 CEST DEBG ][ org.kde.kstars.indi] - Adding managed driver "Pentax DSLR"
[2020-08-22T12:55:34.680 CEST DEBG ][ org.kde.kstars.indi] - INDIListener: Adding a new client manager to INDI listener..
[2020-08-22T12:55:34.680 CEST DEBG ][ org.kde.kstars.indi] - INDI: Connecting to local INDI server on port 7624 ...
[2020-08-22T12:55:34.681 CEST DEBG ][ org.kde.kstars.indi] - INDI server connected.
[2020-08-22T12:55:34.681 CEST DEBG ][ org.kde.kstars.indi] - Connection to INDI server is successful
[2020-08-22T12:55:34.681 CEST INFO ][ org.kde.kstars.ekos] - "INDI services started on port 7624."
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: startup: /usr/bin/indiserver -v -p 7624 -m 300 -r 0 -f /tmp/indififo80f508b8 "
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: listening to port 7624 on fd 3"
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "FIFO: start indi_pentax"
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "FIFO: Starting driver indi_pentax"
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: pid=1756 rfd=4 wfd=7 efd=8"
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Client 5: new arrival from 127.0.0.1:52402 - welcome!"
[2020-08-22T12:55:34.684 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:34.739 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: Device 0 (VID=25fb and PID=017d) is a Ricoh Imaging PENTAX K-70."
[2020-08-22T12:55:34.739 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:34.744 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: Looking for Pentax camera in PTP mode."
[2020-08-22T12:55:34.744 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:34.748 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: The Pentax camera driver for PTP mode uses Ricoh Camera SDK, courtesy of Ricoh Company, Ltd. See api.ricoh/products/camera-sdk ."
[2020-08-22T12:55:34.748 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: Looking for Pentax camera in MSC mode."
[2020-08-22T12:55:34.748 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Telescope Simulator.TELESCOPE_INFO"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Telescope Simulator.GEOGRAPHIC_COORD"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Telescope Simulator.TELESCOPE_PIER_SIDE"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Rotator Simulator.ABS_ROTATOR_ANGLE"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Focuser Simulator.ABS_FOCUS_POSITION"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on Focuser Simulator.FOCUS_TEMPERATURE"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on CCD Simulator.FILTER_SLOT"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on CCD Simulator.FILTER_NAME"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:34: Driver indi_pentax: snooping on SQM.SKY_QUALITY"
[2020-08-22T12:55:34.833 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:35.036 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "Child process 1756 died"
[2020-08-22T12:55:35.036 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:35: Driver indi_pentax: stderr EOF"
[2020-08-22T12:55:35.036 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:35.036 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:35: Driver indi_pentax: Terminated after #0 restarts."
[2020-08-22T12:55:35.036 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:35.036 CEST CRIT ][ org.kde.kstars.indi] - INDI driver "indi_pentax" crashed!
[2020-08-22T12:55:36.799 CEST DEBG ][ org.kde.kstars.indi] - Removing managed driver "Pentax DSLR"
[2020-08-22T12:55:36.799 CEST DEBG ][ org.kde.kstars.indi] - Stopping INDI Driver "indi_pentax"
[2020-08-22T12:55:36.799 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "FIFO: stop indi_pentax"
[2020-08-22T12:55:36.799 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "dp->name: indi_pentax - tDriver: indi_pentax"
[2020-08-22T12:55:36.799 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.800 CEST DEBG ][ org.kde.kstars.indi] - Adding managed driver "Pentax DSLR"
[2020-08-22T12:55:37.800 CEST DEBG ][ org.kde.kstars.indi] - Starting INDI Driver "indi_pentax"
[2020-08-22T12:55:37.800 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "FIFO: start indi_pentax"
[2020-08-22T12:55:37.801 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "FIFO: Starting driver indi_pentax"
[2020-08-22T12:55:37.801 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.801 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: pid=1763 rfd=4 wfd=8 efd=9"
[2020-08-22T12:55:37.801 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.813 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: Device 0 (VID=25fb and PID=017d) is a Ricoh Imaging PENTAX K-70."
[2020-08-22T12:55:37.813 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.818 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: Looking for Pentax camera in PTP mode."
[2020-08-22T12:55:37.818 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: The Pentax camera driver for PTP mode uses Ricoh Camera SDK, courtesy of Ricoh Company, Ltd. See api.ricoh/products/camera-sdk ."
[2020-08-22T12:55:37.818 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: Looking for Pentax camera in MSC mode."
[2020-08-22T12:55:37.818 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Telescope Simulator.TELESCOPE_INFO"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Telescope Simulator.GEOGRAPHIC_COORD"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Telescope Simulator.TELESCOPE_PIER_SIDE"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Rotator Simulator.ABS_ROTATOR_ANGLE"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Focuser Simulator.ABS_FOCUS_POSITION"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on Focuser Simulator.FOCUS_TEMPERATURE"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on CCD Simulator.FILTER_SLOT"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on CCD Simulator.FILTER_NAME"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: snooping on SQM.SKY_QUALITY"
[2020-08-22T12:55:37.913 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.997 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "Child process 1763 died"
[2020-08-22T12:55:37.997 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: stderr EOF"
[2020-08-22T12:55:37.997 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.998 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: "2020-08-22T10:55:37: Driver indi_pentax: Terminated after #0 restarts."
[2020-08-22T12:55:37.998 CEST DEBG ][ org.kde.kstars.indi] - INDI Server: ""
[2020-08-22T12:55:37.998 CEST CRIT ][ org.kde.kstars.indi] - INDI driver "indi_pentax" crashed!
[2020-08-22T12:55:39.932 CEST INFO ][ org.kde.kstars.ekos] - "Unable to establish:\n+ Pentax DSLR\nPlease ensure the device is connected and powered on."
[2020-08-22T12:55:40.468 CEST DEBG ][ org.kde.kstars.indi] - INDI: Stopping local drivers...
[2020-08-22T12:55:40.468 CEST DEBG ][ org.kde.kstars.indi] - Removing managed driver "Pentax DSLR"
[2020-08-22T12:55:40.468 CEST DEBG ][ org.kde.kstars.indi] - INDIListener: Removing client manager for server localhost @ 7624
[2020-08-22T12:55:40.469 CEST DEBG ][ org.kde.kstars.indi] - INDI server disconnected. Exit code: 0
[2020-08-22T12:55:40.469 CEST DEBG ][ org.kde.kstars.indi] - INDI server disconnected. Exit code: 0
[2020-08-22T12:55:40.469 CEST DEBG ][ org.kde.kstars.indi] - Stopping INDI Driver "indi_pentax"
[2020-08-22T12:55:40.470 CEST DEBG ][ org.kde.kstars.indi] - Stopping INDI Server "localhost" @ "7624"
[2020-08-22T12:55:40.470 CEST DEBG ][ org.kde.kstars.ekos] - Resetting Ekos Manager...
[2020-08-22T12:55:40.473 CEST WARN ][ default] - QSqlDatabasePrivate::removeDatabase: connection 'filter_db' is still in use, all queries will cease to work.
[2020-08-22T12:55:40.473 CEST WARN ][ default] - QSqlDatabasePrivate::addDatabase: duplicate connection name 'filter_db', old connection removed.
[2020-08-22T12:55:40.475 CEST INFO ][ org.kde.kstars.ekos] - "INDI-tjenester stoppet."

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