Mine has been doing the same thing, then on our last trip we were traveling in 100° weather and it came all the way out. So I pulled over and put it back in, hit the road and it came out again, I pulled over and this time I put one of the screws through it in the bend there. Well that was a bad idea because now it blew out and pulled the screw out with it and was slapping that screw on the side of my full body paint job. NOT GOOD !!!!
I believe it is from the heat coming out of the exhaust of the new DEF trucks. It's super hot and it's only happening on the right side behind the exhaust pipe.
Not really much you can do to change that.
Jerrod
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