That was a weird one. On a fairly new P1S I got a failed print. (Same PLA roll I’ve been using with no issue for a couple of weeks)
I had ordered a hardened extruder and nozzle, so I took the opportunity to install them, and everything is back to normal.
I’m not sure if that was due to a clogged nozzle (mid print?) or if the filament started to slip in the extruder gear.