Any Twinmotion scene I open, its viewport stutters & hitches every few seconds, I mean while navigating the scene in the viewport, something very similar to that issue exists with Unreal Engine that is caused by having (UDP messaging) enabled for some people & when you disable it , it is solved. for twinmotion In my case this problem happens if I lose internet connection or I am using twinmotion offline, below is a link to a 35 seconds video I recorded showing this problem, I use Twinmotion 2023.1.2 on Windows 11 22H2 with CPU i9 12900K & RTX 4080 & twinmotion is on an SSD drive.
https://drive.google.com/file/d/1A7N-BIXhubdVn3TkCDxd0JN5yiZRtvjf/view?usp=sharing