Hail Wanderer,
This issue has been resolved. If you still experience this issue, please update to the latest version of the game.
As of update 1.12.07 a bug slipped into the game preventing combats from ending. The bug occurs when finishing an opponent with a ‘make a basic attack’ card. A patch is brewing and will be released soon. Sorry for the inconvenience, and thank you for the reports bringing this issue to our attention.
Thank you for playing,
– The Wanderlost team