Sorry that you're experiencing something like that. I can't recall anyone reporting that symptom with my aircraft in the last few years. Perhaps someone else will post here with something else that could help us investigate. Given that it's the render thread, the issue isn't likely to be anything I have encountered in the past with avionics or systems code. The only thing that comes to mind is a BIOS setting that some of my beta testers for Starship discovered that could make a significant difference to periodic hiccups. Also, are you using any third party applications alongside the simulator, or in the simulator, like an AI traffic, ATC, passenger, or even camera application? Sometimes those can create unexpected outcomes.