Back in town and checked out the slide, the weatherstrip is compressed and there are no gaps I can see.
The pie shaped molding is tight (makes sense with it closed) and no sign of cracks in the adhesive.
I cannot fully extend the slide due to space constraints and everything I read says do not extend part way so I will check for external obstructions and see if the molding moves on our next trip.
I could swear that it used to fit flush with the body but since the weatherstrip looks good and it is virtually the same thickness as the other side, unless I see an exterior obstruction next trip I will just watch it.
Thanks again for the replies, if I find anything conclusive I will share the info.
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