https://wiki.bambulab.com/en/knowledge-sharing/power-loss-recovery While it is a handy feature, it can also cause a number of issues, some of which are noted in the above wiki, but also excessive writes and wear on the Micro SD Card, the P1 series are known for burning through SD Cards and it is suspected that this feature can be part of the cause. The feature can be switched off early-ish in the print (via G-Code), which should reduce the wear on the SD card.

I wanted a simple prime/load line, which didn't impact the print area. So I moved the line to be within the 18x28 exclusion zone of the P1 series printers.