Every app freezing, possibly due to "StrictMode policy violation: android.os.strictmode.NetworkViolation"

[dimaryaz]

Describe the bug
I'm using LineageOS for MicroG. Since the lineage-21.0-20240508-microG-instantnoodle update, I've been having problems with every possible app - including SystemUI - freezing for multiple seconds and triggering the "[app] not responding" dialog box (which also never goes away, forcing me to kill the app, but that's a separate bug). I can't say for certain that it's MicroG's fault; I also have Magisk installed. When I updated to lineage-21.0-20240608, it got slightly better, but still bad.

adb logcat shows stack traces for NetworkViolation caused by org.microg.gms.auth.AuthManagerServiceImpl.onTransact - so that's why I suspect it may be caused by MicroG.

To Reproduce
It happens randomly; everything can work fine for hours, even days - then start freezing constantly for several hours. I suspected it had to do with bad network quality; it seems correlated, but not completely.

Expected behavior
Apps shouldn't freeze.

Screenshots

System
Android Version: 14
Custom ROM: LineageOS for MicroG 21, 20240608

Additional context
Output from adb logcat showing the NetworkViolation:

adb.log

[dimaryaz]

Just guessing here, but is it possible that org.microg.gms.auth.AuthManagerServiceImpl.onTransact is not supposed to do blocking network calls? E.g., can it be called by apps' UI thread, etc.?