It's been well over a month since I last posted about this issue, but I reset my PC's bios configuration to factory default settings back in January, and it has completely fixed the stuttering issue on my end. I haven't run into this issue ever since. It must've possibly been a bad overclock...
Here's a video of my issue strangely the recording doesn't capture the audio becoming all distorted but if you look at my FPS counter in the top left corner you can see my FPS plummet from 144FPS down to 26FPS for a second and back up to 144FPS again.
@EmmaWilliamson688 What are your PC Specs? I'm wondering if it has anything to do with my AMD Ryzen 9 5900x CPU since my old PC had an Intel i7 6700k and I never had this issue on that PC.
Glad I found this forum as I also am having this exact same issue with my PCSPECIALIST build I also have very similar specs to you and I’m suspecting it to be the AMD RYZEN 9 5900x but also we have the Corsair H150i ELITE CAPELLIX RGB so it could be that as I’ve heard many bad things about...