Yikes, thats not good to see. Looks like the EDPM material wasnt glued down very well at the front, and has pulled away from the backing under neath. I most likely would use that eturnabond type roof tape and seal that up. I have seen quite a few rigs going down the road at highway speeds, where the roofing material is pulled up there, in that exact spot by the low pressure air present while being towed.
And according to the warranty, you are supposed to be checking on these caulked seams every 90 days. I check mine usually twice year.