2015 Wildwood X Lite CO monitor goes off when no transitioning from plug in to battery

[Emmckee3]

Hey folks,
I have a 2015 Wildwood x lite and have had 8 months. Just recently, after getting back from the service center for roof work, I now have a co detector that chirps when I am driving or when I pull in and plug into the campsite. It lasted about an hour and I kept trying to reset it. It shows full battery, it's plugged in and just keeps beeping.
Now home, it was beeping when I pulled in to my driveway, again, took about an hour of resets and patience. That was yesterday. That makes me believe it was beeping most the way home. But, I did stop for gas and it was not alarming at that time. Odd.
Now, I come home from work, it's beeping again. It's been plugged into my garage 24 hours now. Battery is fully charged, I have checked multiple times. The LP tank is off and has been since yesterday.
Any ideas how to get this to stop? What the issue is?
Thanks,