The nozzle sits on the purge tower while loading/unloading filament.
This causes a defect in the surface.
Subsequent passes hit this defect, and can cause the crash detection to trigger, repeatedly.
I suggest lifting the head, or wiping and traveling to the side of the purge block while sitting.
In my case, I may be having issues with overstuffing that are causing the dragging, as shown below.
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