Take back and time out

Hi!
While playing this game:
http://de.lichess.org/xd0crg6zi50b
I accepted a few take back from the opponent, and even if I had like 30 seconds left (and 5 for the opponent, if i'm not mistaking), accepting the last one costed me the game by time-out.

It's on the todo list for take-backs to also give you time back.

ok thanks