Question Sapphire AMD Radeon 5700 xt white screen

[Murre]

Hello guys .. got new gpu 5700xt ..after monitors Eco mode (sleep mode ) when im trying to open it clicking keyboard or mause white screen comes but only happens during monitors sleep mode ..normaly run very well no problem playing games etc.. sorry For bad eng hope you guys help me

 

[Murre]

My monitor lg 22mk400h-b