At least two dots deadlined from the emitters not being sealed properly. Warranty issues.
As for my personal experience and the shooters to my left and right, I was running an SRO on a Glock 34. During the heaviest of rain the dot would disappear into either full kaleidoscope or no dot period. Flick the wrist to clear the water or fire a shot and the dot would be back momentarily. RMR to my left, same problem or multi-dot.
Cop on my right with an ACRO P2, hammering along through the drills with no problem.
Both of my carry guns have closed emitter optics on them. If rain is in the forecast my carry gun will be in the case with me at the match and I make a game day decision what gun to run.
I've had the same experience.