Looks like my #Scrypted server has a failing SSD... 🫣
Intenso M.2 1TB, not even a year old. SmartTools doesn't show anything suspicious other than the drive hard-resetting itself during a 10-minute self test (in other words: the drive probably has a crappy SMART implementation too).
Already ordered a new (Kioxia) drive, lets hope this one survives until the new one arrives.