Hello, try to increment your min latency (in advanced general settings). If you use wow addons disable all. You can also try without plugin/fihtclass and with fresh WRobot install (with default settings) (to be sure that is not problem)
You are sure that you use last version? I tested again I cannot reproduct problem.
For me the problem came from CTM, sometime he was called with float.NaN param (that do blackscreen or crash wow)
you are the first to report me this problem.
When you found bugged node blacklist zone.
FPS seems low, what return https://wowwiki.fandom.com/wiki/API_GetFramerate ? Maybe code like
if GetFramerate() < 5 then ReloadUI() end
can resolve problem