Thank you Bormax, I am afraid I am still not able to reproduce the issue in your scene (3dsMax 2022-24.0) but there seems to be some quad setting or a bug with custom quads including the Corona IR extended viewport, that's probably related to the twitching movements, but that's just a guess. I am getting some weird twitching on the axis of objects and viewport refreshing when moving the cursor around, notice my cursor movements and what's happening (non-local axis, non-transform coordinate center, unfortunately the viewport-glitch refresh is not captured in my gif but it can be seen in your video).
Can you please try and reset your custom quad and see if it it's reproducible?
(Report ID=CRMAX-1206)