@wiseolddudeOh, that's weird. I don't have a clear idea, I'll have to look into this
In that time do you want to try a different GPU driver version, maybe a newer or an older one?
Good luck.
Edit: Okay so, finding the cause of this micro stutters is hard. There are many factors which scales from GPU to the game. I'll just list you the things that might be your problem, you have to find it yourself.
- Insufficient RAM/VRAM
- Unstable CPU/GPU Clocks(You said it is okay)
- CPU overheating
- GPU driver related issues(I recommend you to do a clean install with the help of DDU).
- Maybe your hard drive can't catch up but I don't think that would cause a problem in that gaming moment. Still, monitor your hdd.
- Maybe it is really Apex's problem(Repair game via Origin).
These are the things that came to my mind and make sense with your situation. I hope these will help.