I have a squier musicmaster Vista series. I've always used round wounds but thought I would try flats. A, D and G strings are fine, the E sounds like I'm playing in a bin. I've done the intonation, string height, pickup height. When I fret the string it sounds out of tune, doesn't matter if I press hard or soft. They are rotosound short scale flats. I contacted them thinking it could be a dead string and they sent me a replacement straight away. Thanks rotosound, nice customer care👍. But alas it's the same story, aahhhh.
any suggestions? Maybe it just doesn't like them😭.