Updated to 8901.4.0016.6 yesterday and after a reboot the assignment of SIM1/SIM2 to functions (SMS, Phone, Internet) is again lost.
This issue existed before (cf. 🇬🇧 🇩🇪 Report: 1 month Android 11 / Erfahrungsbericht: 1 Monat Android 11 - #17 by yvmuell and also a bugreport 528986), was fixed in build 8901.4.A.0013.4 and now raises its ugly head again.
Annoying!! (and that’s saying it mildly)