iexos-100 pmc-8 mount has wrong tracking rates

[NeTox1c]

Describe the bug
I have a iexos-100 pmc-8 mount. So far everything is working with it withing EKOS, but the tracking rate is totally off.
When I set it to sidereal it sets 15.00000 instead of the correct 15.041067.
The option for setting a custom rate does not work.
With an older Ekos/Indi (pmc8 driver version 0.4) the tracking rate was correct and setting custom rates was also working.

To Reproduce
Exact steps to reproduce the behavior.

1. Connect to an iexos-100 pmc-8 mount through Ekos/Indi
2. start tracking
   3a. choose sidereal -> bug
   3b. try setting a custom rate -> bug

Expected behavior
The tracking rate of "sidereal" should be set to 15.041067 and not 15.000000.
When setting a custom tracking rate, the value should be send to the mount and the mount should track with it.

Screenshots
In the added screenshot you can see in the log below, that I am switching between Lunar, Solar and Sidereal. None of the tracking-rates are correct.

Desktop (please complete the following information):

• OS: Raspberry Pi 4 OS (different versions tested), Stellarmate, Astroberry-Image (mount is working with this old image)

Log Files
Make sure to enable logging and include log files log_08-43-48.txt