What is the build specs of the pc you are having issues on? Not asking so much as to the nature of "is it enough to run LB", but more so to compare to a few other threads of some users having issues. A couple recent threads were with AMD Ryzen builds.
A few things to maybe look at based on past threads/discord.
1. Check task manager and see if you have nahimic services running. This has been known to cause some graphical glitches and could be a place to start if you see it. Try shutting the process down and see if anything changes.
2. If you have an AMD build and using Adrenaline or Wattman it is possible either could be causing issues. This was mentioned on discord, however that user never responded back if either of those were causing the issues he was seeing. So just recommending to check with your specific case.
It definitely has to be something with that pc since your other builds are working normal. Something in it either does not like LB/BB or LB/BB does not like it.
These issues are tricky to figure out. Most of the times it turns out to be some software causing the hiccup. We have seen things like Corsair software, audio software, and others cause issues with LB/BB you would not normally think would. Not saying it could not truly be a LB/BB issue.