Unable to Make a Move After Opponent Requested Undo (Beat the Kyu & Be a Dan Tournament)

[square.defender]

I wonder if something like that happened there:

Tsumego Dragon Can Now Play on OGS!

there is bug that stops game when someone undo requests? [16:32]Ranii: can a game be nullified because I could not see the undo request on tsumego dragon so I had to resign because the game just stopped? not that I care too much [16:32]Ranii: game 84340486 (Or only accept undo didn’t work? And the one who misclicked just didn’t wish to move?)