I've had my NC sitting in the garage for around a month due to travel and weather. Around the same time this all started my NC was running strange 95% of normal.
This week the rain is taking a break, the temps are back to the upper 30's or better and I'm back to riding, yesterday my NC was still running at 95% but it also through a code (85 or 96) not sure if it was cleaning the connectors or tightening battery connectors but my NC us back to 100%
P.s. After disconnecting the battery I hooked it back up and started the NC without touching anything but the starter, I let it idle for 30 min (I went inside and ate dinner) EFI reset