I believe this issue got fixed with an update. Generally they supported the Silabs tuner better than Mutant. Their driver reads the signal correctly and is even supporting auto values for almost every parameter (except blind lock that only Dreambox has ftm).
If I find some time I will compile a full table with what's working or not between different Silabs receivers/drivers.
The motor issue is purely driver based. Think about this only, the default power measurement value is a global setting that is now set to false. If it was that crucial, it would affect all tuners and all receivers, it clearly does not. I don't remember any image allowing the user to set this manually anyway.
Besides this value set to true creates other issues. This is why I told you it's a workaround rather than a fix. A fix rectifies all problem.
BTW, my joy lasted for a little while.
After I rebooted my HD51 I saw that my tuner is no longer functional. I had to revert to an older settings backup to get it back... oh well