Doors off; Jeep leaks

I have a 2016 JKU Soft top that has spent he better part of the last 4 summers with the doors off. After the first summer, it developed a leak somewhere around the passenger side door, and this year it developed one on the drivers side at the top front corner, occasionally surprising me with a shower from the plastic trim after a heavy rain. 

Are there any known culprits for this, and what fixes have you tried?

To this point, my solution has been to remove the carpets and drain plugs, but I would be interested in a more permanent fix if one exists.