Tailgate sticks on 2020 Ram 1500 but opens if I leave it for a few minutes

[TTracy]

I had body work done where they replaced the tailgate and one of the box sides. It was fine for a few months but now I've noticed it sticks. I can open it initially, but if I close it and try to reopen it won't. The latches click and it releases about 3/8 inch but won't open. If I leave it sit for 5 or 10 minutes then try it again, it works perfectly. I've tried pushing in while pulling the release but that never works for me. I've sprayed the mechanism with WD-40 multiple times. I'm afraid to close the tonneau cover in case I can't get it open again. Does anyone have any idea why a time delay would make a difference?

 

[TTracy]

I checked it with the tailgate open and the latches latched. It works the first time but subsequent tries does not unlock the latch on the right. If I keep pulling the handle the latch on the left seems to respond less and less until it is a very weak click. After a few minutes, maybe 5, it works again.