Think something was slipping???

Went riding over the weekend with my girlfriend and after I ran thru a few puddles (not very deep, the water just barely came up to the bottom of the foot rests) then it felt like it the transmission was slipping. It would accelerate but not like normal. Matter of fact it hit the rev. Limiter and I was hardly moving. I thought I had read something on the forum here about this issue. So I removed the little red plug on the belt housing and maybe a ounce or two of water came came out. My girlfriend went thru the same puddle and had not issues or not water in her belt housing. Any thoughts or recommendations? Thanks in advance. I searched all morning and couldn’t find the article/post relating to this subject.