Can't think of a reason why m1ddc would be involved - however it seems indeed weird that the m1ddc xpc service also exits / crashes at roughly the same times as BTT.
Could you attach the current BTT Logs again? (to make sure it now has the correct BTT Relaunch, because the screenshot you posted earlier shows that the correct one is included in BTT - but maybe an old one is launched from some old location)
Sure, here it is!
Archive.zip (156.4 KB)
It is still running some old BTTRelaunch version, otherwise these logs could not appear:
2025/12/08 13:45:58:787|BTTRelaunch|BTTRelaunch: BTT crashed or quit unexpectedly, initiating restart|
2025/12/08 13:45:58:790|BTTRelaunch|BTTRelaunch: BTT standard version still running, forcing quit|
In activity monitor, can you again search for BTTRelaunch and check what executable path it shows when pressing the info button?
/Applications/BetterTouchTool.app/Contents/Resources/BTTRelaunch.app/Contents/MacOS/BTTRelaunch
and is it still the wrong version & crashing?
There is no way I can think of how that could be possible if you deleted /Applications/BetterTouchTool.app before downloading the fresh copy.
Unfortunately there also haven't been similar crashes / logs
I didn’t see any more crashing after this reinstall!