Hi all, so I already found the solution to my problem but I thought I document it so someone with the same issue might find help.
Yesterday my FP4 started getting stuck in a weird boot loop out of nowhere. It started up right until the lock screen where it stayed as long as I didn’t unlock it. When I did, I had maybe a few seconds until the phone crashed and did a (very quick) restart, crashed again etc etc.
The solution: I discovered that my SD card was not inserted correctly. As soon as I took it out and put it back in properly everything went back to normal! (Well except that for some reason my search engine changed back to google and my colour settings reverted to blue. Let’s see if some other funky business is going on)
I hope this can help someone!