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Question Monitor goes black and back after Sleep mode

Jul 6, 2020
So I just bought a new PC and with it a new monitor, the Gamemax GMX27F144Q 144hz 1ms QuadHD.
The problem appears whenever I launch a game and previously the PC was on Sleep Mode, it stays black for 2-3 seconds and then blinks the game screen and goes back to black screen.
The display works just fine if it never went to sleep.
I've been fixing it by turning the monitor's refresh rate back to whatever and then reverting it to 144hz again, so I'm guessing the problem is right here but I can't find a definite fix.
Wondering if any of you have been through the same problem, anything helps.
Thanks in advance and sorry for the scuffed english.