Have you checked the coil pan and compression gasket on the AC? I know the coil pan drains can get stopped up. Even though you see water draining outside, it still could be the pan. Might be full and some water spilling over outside, and inside. Either way if you don't see anything on the sealant or trim outside, and it's leaking when it's NOT raining, the AC may be he culprit. Also possible the water IS draining out of the pan correctly, but making it past an improperly compressed gasket. Would be odd the way the roof is sloped, but possible. There are several ways the AC could cause issues, but my guess by your observation and by the way the water looks, is that the water is running inside the ceiling.
Sent by ME
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.