Probably just a minor bugfix over .1
I kinda doubt it's minor. A minor fix will be rolled into a new update - makes no sense to spend cycles developing and testing for something minor. My guess is that it's something to do with either beach buggy game or the new app dock.
I've yet to get an OTA update on my M3 Performance, I've had to take it to the dealer each time to have them trigger it. Any ideas as to why? I'm on 2019.20.2.1 and have Advanced selected for updates. I really hope they introduce a pull mechanism for updates at some point.