I’m also experiencing this issue (or similar) on the Xbox Series X. I feel the UTC element is not the actual issue - I think the sim itself is just running slow and struggling to keep up with real time. I’ve personally only really noticed this with the ATR recently but going to check with other planes.
Very frustrating really, and quite a big immersion killer for me. Not as fun trying to fly these planes in slow motion 
Worth noting there is a similar post about this here but I think it’s most appropriate in this sub-forum
Also this is an Xbox only issue for me (also use PC too but seems fine)