I have a borderless window with the size of my monitor resolution. With the latest Windows 10 update after pressing Win key (or alt+tab), it takes about 5 seconds for task bar to pop up. Is anyone experiencing similar behaviour? P.S. My code used to work without this kind of delay.

Unacceptably long alt+tab on Windows 10

dougbinks May 18, 2018, 9:36am 3

I’ve tracked the problem down via a search online and confirmed it’s a new Windows 10 feature called focus assist. See here for fix:

GLFW disable restoring resolution of fullscreen window?

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