Crackling STEMs on Sound Quality setting

I’m an open format dj who utilises stems a lot to create mashups and generally to flow between genres.

As of recently, I’ve been getting really bad distortion on the sound quality setting on RekordBox when I trigger the stems (eg when I isolate the vocal and scratch in a new song). The entire song crackles and sounds super distorted, which I have never experienced before.

I’m on an M4 Pro with 24gb of unified memory, running the latest RekordBox and MacOS versions, and I am on the FLX10s, so I’m on the very best equipment money can buy right now.

Just wanted to know if anyone’s ran into this issue, and if anyone found a way of fixing this. It’s getting super annoying as it also temperamental (i.e. sometimes only on the left deck (or the right deck), sometimes both, and sometimes I’ll get lucky and it won’t happen during my performances).

Thanks!