Help with Quick Draw beds: Uneven but still work okay

I have a set of Lippert Corp, Quick Draw beds that have been trouble free. Last trip while putting the beds up we heard a clunk sound while returning to the upright position. Nothing was caught so we assumed it was okay. Well its not.

It seems that the front right corner has skipped a link or something on the chain. The right corner is about an inch lower then the rest. The operation up and down is still just fine. I cannot for the life of me figure out how these beds even work. Does someone have some insight I hope. See pic below.

There is no way to open up the top rails and see if the chain is okay or not? Any other ideas would be helpful.