I know that this has been an issue as it appears all over the internet. We have a 2012 10,000 miles on it Winnebago Sightseer 33c. We started hearing a noise and pulled into a truck stop. Found the bracket holding the sway bar on had lost it's bolt. Bracket was bent and the bushing was destroyed.
Thankfully for us, a young trucker came over to see what our problem was. He climbed under, found a bolt in his gear, straightened the bracket and put everything back on so we could travel to our next stop.
I ordered a new set of brackets and bushings and we had a mobile repair service install them.
Just a note for everyone that you might want to check those bolts. The repair guy said that this sometimes happens to a series of chassis when the torque is set wrong and is not changed for an entire run of chassis. They eventually catch it and change the torque back to what it should have been, but those that were not tightened properly all have a problem.
This should be a recall