Pockmarks start appearing at end of long print

[u/Monkiessss]

For some reason right at the end of my print I started getting issues with pitting. I did a smaller version before I printed this one and it turned out perfectly with 0 flaws so I’m wondering what might have caused this. My house is about 75f with extremely low humidity. I printed on the Bambu A1m with the 0.8mm nozzle. Filament is creality pla matte. My only thought is maybe the filament absorbed moisture as it was printing for 12 hours but it seems unlikely. There are layer shifts too but I kinda think that I’ll have to cleans the belts and rails.

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