Fade to black. Error during guild wars match

What you were expecting to happen, and what actually happened?
I was playing a guild wars game (versus anonymous). Screen went black. So I waited and waited in hopes of it getting well, visible again. After the pc fell asleep I thought I’d check on my mobile phone. And there it was. A match loss.
After waking up the PC screen was visible again. Still in the match. But with match loss.
So I played only one game versus Tranimo, but got a matchloss because I started mobile version while PC version was bugged out? I’m a but furoius at the moment to say the least.

What are the steps to make it happen again?
All I did was turning off the monitor for a few minutes. After turning it on again, GoW went black, except for the mouse cursor

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