That first obstacle on Moab Rim is called the "Devil's Crack" been on that trail twice with my YXZ. It is not uncommon for machines to roll on that obstacle. The line that you take is very important. The Z turn is interesting as well. Last year I bent a tie rod coming down the Z turn.
Went back to Yamaha at the Spanish Trail Arena and the Yamaha guys gave me a free tie rod set.
Yup, the crack is known to cause rollovers if the right line isn't picked. A good spotter goes a long way here.
Glad to hear Yamaha was able to fix you up with a tie rode set at no cost, that's awesome!