Glitching textures when inside MLO

I’ve been having trouble with my custom MLOs. I’ve been learning mapping just for a month now and I seem to have the same reoccurring problem, which is texture glitching while I’m walking inside my MLO, specifically along some of the edges of the room. I’ve tried many different houses and so far, the only location that didn’t glitch was in Mirror Park for some reason. Does someone know what could be wrong?