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If you shut down and restart does it still happen?

Yes.. It still happened...

This suddenly started happening after you have been using the build for a while?  Or is this a new copy that you just downloaded?

I already have the build earlier... I don't know why it happened.. maybe it because I haven't use it for a while... you may check the update date on my video at 

Very strange.  By any chance are you on Discord?  If so there is a pretty active community of folks who are willing to help troubleshoot.  If not my best advice is to download and reinstall.