This issue has been going on for many of us since Forest Colony was changed to a dark, gloomy map. Some say it is a Bloom issue, but I have been unable to disable Bloom.
"The Black-Out Bug".
When weapons are fired near my mech, even just missiles, my screen goes black except for the targetting HUD markings. This causes me to lose my mech (defeated) very fast because I can no longer employ any TACTICS, being unable to see anything at all.
I suggest you brighten all the gloomy maps back up until this issue is resolved.
I notice you had the question of this BUG posted and 95% of respondents answered, YES, we have the Bug.
Another option would be to enable Brightness and Contrast controls.
Another option would be to add a Disable Bloom checkbox, if that is what is causing the Black-Out Bug.