I am worried about ILs; I can get a lower in-game time with a longer recorded playtime if I use slow-mo and that's why I'm trying to find out if that's the timing method we should be using for ILs

I don't even know if anyone is paying attention to this game at all anymore but I've been picking up running individual levels, and it turns out the in-game timer also slows down whenever you're in slow-mo. Is that going to be a problem for timing runs?