Roof plywood joint seperating

[Sydvero]

Up on roof of 2015 wildcat bhx to wash and noticed first joint in plywood about a foot back from front cap seems to be seperating. Can feel sponginess in between plywood seperation most likely foam board I assume. Is this a big problem. Doesn't seem good to me. Rubber roof and dicor not cracked are separated. Any ideas or help appreciated. All trips cancelled this year do to wife's illness. Thanks Paul.

[RSchleder]

I think you need to get it into a facility that can give you a good, sound answer. Separation and spongy spots on a roof are nothing to mess with or delay corrective action. Regardless of how serious it is at this time, if it is a problem, it will simply continue to degrade with time.

[Sydvero]

Do you think it is a frame issue or something else