Roof rubber separation - repair advice?

[grasshopper]

Looked at a 2018 Keystone Toyhauler today. The glue job on rubber roof seems to be an issue.
Anyone have any advice as to:
1. Anyone had this issue? if this needs costly repairs?
2. How it needs to be solved?

No evidence of leakage....yet

See vid clip.

thanks!

 

[TheLooks]

We see that frequently. They use a metal or plastic piece to "ease" the edge where it rolls over. Seems like many of them pop up like this. Have not seen one fail because of it however. I don't like it either though.