Originally Posted by GSNorCal
This is not a common failure in my experience, and we've mounted many of them on race bikes and on rental bikes. The plastic is pretty "grabby" on the threads. Maybe they were the wrong screws???
Would seem odd for the factory to use the wrong screws, if so it likely would be a full run of them with the wrong screws so probably worth keeping an eye on these.
My trusty roll of duct tape came to the rescue and held it together for the rest of the race.