I think the 20+ computers on these rigs just have a brain fart at times. Just like your home PC needs a reboot on occasion. My 2017 has had a few quirks - chime going of every 30 seconds for no reason. Pulled over, turned it off and restarted. Never repeated since. Turn signal blinking but no noise. Same fix - pulled over - rebooted - never repeated since. On a 1,200 mile trip a couple weeks ago the temperature display stuck at 32 degrees thru multiple starts over a couple days while daytime temp was aver 60 degrees - finally reset....