This seems coherent with the solved issue reported by @lkraav refering to an Android app bolt after upgrading microG:
Unfortunately, my experience is not the same. The GPSinfo was not working at all with SaiFish OS installed over Android 12 like many others people reported.
Once I downgraded to Android 11 and reinstalled SOFS, then the GPS fixing time was inaceptable long using GPSinfo before I decided to update microG at the last preview version. Obviously, I can revert it back to the stable version and make some tests again.
Also, Pure Maps started to work correctly and do not crash with the new version of microG. Again, I can do more tests expecially outdoor because some people reported issues happening outdoor, mainly.
I would happy to change my mind because as tiner the microG role into the device functioning and thus the Android system below, as better.