I'm noticing a weird setup issue with my strat. When I get on the 2 lowest strings at roughly the 12th fret it sounds absolutely dead. Like the slide isn't making contact with the string. Even if I make sure the slide is in contact with only that string it still happens. I thought I might have been hitting a fret so I raised the action up even higher and that didn't solve the issue either. I was playing in Open G and it was really bad. I tuned it to Open E and it was slightly better. Currently it is strung with .011s.