Game mode was Random Draft.

I was experiencing sound bug (no sound).

I picked random hero by clicking "Pick Random Hero" button.

I restarted dota 2 to fix sound bug.

I reconnected but could not enter game. I had randomly picked Lion. The button said "Keep Lion", I could click it and hear the sound, but could not enter the game.

I restarted dota, steam and tried disconnecting/reconnecting several times but nothing worked. Ended up having to abandon.