Hello @argos, sorry to bother you again, but would you be okay with flashing (in the recovery mode thanks to the adb sideload command) an update in order to test if the dev team succeeded to locate the problem and fix it please?
You wouldn’t loose any data (because it’s just an update) and I would test this myself on my FP3 before to make sure the update process works correctly. I would also share detailed instructions on how to do this.