Has anyone ever had an incident where the seat belt came unlatched?

We were trail riding our 2013 Jagged X yesterday, I was driving, came around a corner a little too sharp and caught the side of the wash with the drivers side front tire. It tipped the machine onto the passenger side, at some point my seat belt released and I was thrown across the passenger side and into the ground.

After researching, I realize we definitely should have replaced the factory belts with harnesses, but the belt was completely buckled into place and released during the wreck. Is this a common issue?

Utah RZR Rentals