To everyone using /e/ on the FP3: I would wait with the very latest update from October 3rd. I installed it and the phone is now not starting anymore. See also the thread in their GitLab, lower end (copying the direct link doesn’t work for some reason, sorry). Seems there are more people who are facing this problem.
Oh, if anyone has a clue how to solve this issue (apart from factory reset), I am open for any hints