thats strange that you mentioned that. I had the same exact problem with my PSE Stinger this year. I went away from the tubed peep and got a tubless. Problem went away...I tried serving the string above and below the peep and still had the same results. The tubless took a bit to get used to but, so far, so good. I wonder if we had the same tubed peep on and the mfg ran a bad batch to where the strings arent sitting deep enough into the peep?