Welcome to the forum from a former Rusk County native. Sorry to hear about your issues. I don’t recall reading about a situation like yours since I joined the forum in 2018 (edit: boy was I wrong! see links below for your reading pleasure)
The day I bought my unit, a service tech took me out to demonstrate the level-up system. Basement doors were open and there was a bright blue flash electrical explosion that came from the InCommand BCM board. The tech called on the radio for another tech to come look at the issue and he took me over to another unit. I have no idea what the end results were, but it had to be an expensive fireworks display.
I did a forum search of "electrical fire" and found these...
From Oct 2021 - a good read
https://www.montanaowners.com/forums...ad.php?t=85774
From May 2021 ChuckS documented burnt wires to the pin box -
https://www.montanaowners.com/forums...ad.php?t=84152
From June 2009 electric fireplace issue
https://www.montanaowners.com/forums...ad.php?t=34306
From January 2009 fire in the front compartment wiring harness
https://www.montanaowners.com/forums...ad.php?t=32366
From Nov 2007 - electric fireplace issue
https://www.montanaowners.com/forums...ad.php?t=25421