GEM45 here, with the same problem when trying to park.

Some background: I just updated my StellarMate packages. With indi_ioptronv3_telescope now being used for all iOptron mounts by default, I was required to update my mount firmware to restore functionality. While this did solve the communication issues with the mount, I am now facing the parking issue (mount continues to report tracking/slewing and must be stopped via the handbox in order for parking to engage).

Any progress or development on this issue? Thanks!!

It's a bug in iOptron firmware and I reported it to them. I think users here need to follow up with iOptron to push them to fix this. This is the email I sent to iOptron in January:

CEM70 user with the same issue! Mount parks correctly, but "slewing" is reported.
I've just emailed iOptron with a link to this page (and all the affected users should do the same, IMHO), let's hope they'll do something about it

I haven't received any updates on this from iOptron yet. Anyone with better luck? The problem must be solved at the firmware level.

They replied to my email with "engineering will look into this".
Let's hope they'll do that one day..

Just for clarify. So with a CEM70 mount, when you press the Park button on Ekos, the mount do the Parking procedure but at the end of this Ekos report always that the mount si slewing to..... Correct? No other issues related to this mount win Ekos/INDI???

Correct.

Ok it is little "issue" that not cause other big one. I purchased a CEM70 mount few days ago

Yep, I have a CEM70 and it does that (although not always).
No big issue for me because I setup and tear down every night. Might be an issue (or better, an annoyance) for ppl with observatory and stable setup though.
My workflow is: setup everything, staying awake a bit to check that all is working fine, going to bed because meridian flip and auto-park will take care of everything, wake up and see that parking is horizontal (even though I set vertical) and, most of the time, still reporting slewing to. Therefore I click "goto home", turn off everything, etc

Few minutes ago i powered up my new CEM70 mount. I used the pad to go to the Zero position and setted it as PARKING position.
I would do the same thing in INDI to park the scope in a position like the Polaris instead then in horizontal. Any tips to gain this result?

Maybe a useful update:. After reading this thread I just got my new CEM120 and set the Home position and a custom parking position at aprox 90 degrees using the hand controller. Then I set up EKOS with same parking position and it all works fine.  I can Park and unpark from Ekos and it shows the correct status in mount control. Mount connection via ethernet. I do however have a different problem at the Meridian that I will start a new topic for.

Hi Jasem,
any update on this? I have just got a CEM70 and I find it exhibit this strang behaviour: report it's slewing while it's actually not. Always parking in counterweight down position (home and park position are the same) while it's different if I use the hand set. (Home at counterweight down and park at counterweight sideway).
and many more small issues (the mount sometimes refuse to slew when it's commanded the first time, I have to issue second command...)