Hi wildi,
There is a separate driver for the GTOCP2 because it does not have many of the advanced commands in the GTOCP3 and GTOCP4. This is why the experimental driver was made in order to handle the CP3 and newer control box. So you may want to try the GTOCP2 driver on your CP2 control box.
Yes, it is strange that I am having such issues now on the older driver which has been working well for me until I updated to KStars/Ekos 3.4.2. As mentioned in my first post the mount works fine with the Astro-Physics Experimental driver in EKOS 3.3.7 that I have on a Pi3B +.
I have rebuilt the Pi 4 using the latest script from Robert Lancaster and have run some simple tests. I have attached the log file from that test. The driver appears to be your latest driver as I chose to pull the latest master from his script.
The test is done indoors as I have the mount off the pier for some basic maintenance. I started with the mount in the Park 3 position and set the INDI option to unpark from Park3. The mount in Park 3 position:
I then connected to EKOS/INDI and when connected I also set the "Park to" option as Park 3. I also saved these settings in the INDI configuration file, however the driver seems to not read this correctly.
I then did a small Goto to the star kCephie which was just to the right and slightly down from Polaris at the time of testing. While viewing the mount from behind and looking North the mount should have moved the DEC axis slightly right a few degrees and the RA axis should have also moved the scope slightly right a few degrees, however this is not what happened and here is how it looked when finished with the Goto:
The DEC axis appears to have moved correctly while the RA Axis has moved way off to the left.
At this point I commanded the mount to park and here is where it ended:
It should have returned to the Park 3 position as that is where I set it to return to, however as you can see it did not.
Hopefully the log file will help to reveal something useful along with this information. I am happy to continue to help test the driver so we can get it all debugged and working.
Thanks for your help!