Got mine back this afternoon. Their diagnosis was - "45 minute water test found a couple of drips 4 inches to the left of right a-pillar. Recheck weather strip found front weather strip not completely seated. Properly install front top weather strip and retest with water for 40 min. No other leaks found." Hopefully, this was the cause. I will recheck with the next heavy rain that we get.
2016 Red Hot 2SS convertible Adrenaline Red interor, A8, MRC, NPP, Black Bowties, NAV