black screen bug?

Hi, I was wondering if anyone had issues with b+ generating a black screen when switching canvas?

The black screen happens also if I move the blue window bar (the screen stays black till I let go) or sometime when I access the menu's.

Anyone encounter such a thing?
Ive tried vwait: flip false (no luck there)

Thanks in advance.

have yer tried flipcanvas??

Mr Brine

yes, that does not work.