Dark screen in Haunted Mines

[SteveFrost 97]

Hi guys,

Can't remember since when but when I play in Haunted Mines and leave the side lanes, the screen darkens; pitch black. Can only see things like health bars and battle net ids. This makes the map unplayable for me for the most part and it's really frustrating. Did the scan & fix corrupted files from settings but it didn't help. Anyone else having the same issue and/or knows a fix?