Recently I've experienced few problems too:
- after idling all games for the first 2 hours the program should start idling every game seperately but it just stuck on "Next check: 00:00" with infinite loading ;
- sometimes when idling a game the program stops actually apdating idling process time and not granting me any cards as a result.
This came with the last update or what? Haven't seen lots of reports like this either.