Mine does that to me all the time on the trail and it won't reset until the Jeep is fairly level. It makes me nuts!
I have even considered installing another lap belt only that I can use for trail riding only.
06 Rubi with some sort of double ended, chrome knobbed, cross threaded, infinitely adjustable, frequently breakable, worn out flammywhammers zip tied onto it.
It used to be a jeep thing... til that sh!t broke!