black screen for 3 seconds when switching full screen game

[aco1k]

When I switch between fullscreen game and desktop I always have 3 seconds black screen (with sound). I recorded on AMD Ryzen 3700X and GTX1070.
The problem also occurs on my laptop with intel i5 6200U and hd graphicis 520.

2020-07-24 11-28-24

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[aco1k]

obs classic doesn't have this problem.