Dont know why, but on lobby when i click to show the games on hell, a lot apears. But in nightmare or normal, dosent apears any game. Try to refresh, close and enter again on lobby and this keeping happening. =/
You should play diablo 2 Resurrected it’s the last version of the game 
Sometimes I have the same problem. I scroll up and then suddenly many Games appear. Pls test the scroll up or down.