about 2 years ago - Ahskance - Direct link

The time of the disconnect/afk is factored in, though it does look like there was a solid 10+ minutes of play in the beginning of the game. That would be over 50% of the match, so that does seem quite sizable.

The thought about not dealing any damage after returning to the match could bear looking into.

I'll kick this up the chain and let you know what I hear back.