I'm just going to chime in here and say there is absolutely no way that anyone at Ram corporate or engineering would tell anyone at a dealer that this was an issue that they knew about and are leaving it to dealers to fix.
1) They know something like that would get out and it would create a huge backlash.
2) These trucks are too important to them to knowingly launch with an issue like that.
I think we all know that more **** comes out of a dealer service department than a sewer pipe.
If it was a design flaw it would affect every truck, it's most likely an assembly issue. Enough people seem to have it that we can at least say it is somewhat common. Preproduction test trucks aren't built in the factory where production trucks end up getting built. This of course is to prevent information leaks, figure out the best way to assemble them, have complete control over the build process and easily make changes if need be, etc. Unfortunately some stuff can and does crop up on the actual production line when customer trucks are being built which is a large root of the first year manufacturing issues that crop up with various manufacturers FCA included.
Hopefully they figure out a fix soon, but keep in mind that Ram will have to fix a truck with the problem and give it a bit of time to verify that whatever they do is the correct fix before issuing a TSB or anything on the issue.