After my tests last night.
When capturing an image with my DSLR, the system has to slow down due to accessing the SD card of Raspberry Pi4.
This leads to a loss of the guide star and EKOS reset the guiding. I have restored my SD CARD with my old version of 15 days ago (Ubuntu 19.04 and Kstars v3.4.1)
I have the same problem, the star is lost about 1 second but Ekos did not reset the guiding. Ekos allways run the guiding and this does not turn off dithering on other captures.
In version 3.4.5, this causes reset the guiding
Sometimes on version 3.4.5, when the guide star is lost, the DSLR captures with short exposures although the ZWO camera is dedicated to guiding
This usually causes the program to crash
I ordered a SANDISK extreme PRO fast SD card a few days ago, originally it was to speed up my RAW recording times. Hope this will solve my problem as well

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