I had the same issue with a xerun 10.5t and 120A v2.1 and 930 stock software.
Two days ago I drove for the first time since 6 months and ran with 5200mAh 50c lipo's. I set my cutoff to 6.4v just like last year.
Halfway the run the cutoff intervened. After a few times that it happend i set the cut off to 6 volt and didn't have the problem anymore.
It could be that the cells have to wake up after 6 months or so of not being used or maybe because of the cold that the lipo can't keep up the voltage yet (together with the 6 months of not being used). Not sure but lowering the cutoff to 6 volt seemd to cure that problem.