Yes it is possible. Might be worth climbing up on the roof (carefully) and remove the a/c cover shroud. There will be 4 lag style bolts holding down the a/c unit. they are not torqued to a high number, but need to be uniformly tightened down. I've had one bolt looser than the others allowing a trickle of water to enter that corner. Might be worth a check to see if you have something like that happening.
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2013 Tiffin Allegro 34 QFA
2015 Cadillac SRX (towed)
2019 Tesla Model X
1991 Avanti Conv
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