Can't heal units

Just had this weird situation where I tried to start a NM solo but it timed out without starting the battle.  I tried this several times with the same result.  I then tried to do a coop but was never entered in the queue.  However, when I checked my units in the barracks, they all needed healing.  They didn't need healing before, as I wouldn't have been able to select them for battle, so it's as if they'd taken part in a battle without my knowledge!  The worst part though is that I can't heal them now.  If I click on the 'heal all' button, it tells me how much it will cost but when I click Heal, nothing happens.  Please release my minions from their state of limbo, they have loads more souls to torment yet.

Edit: Solved the problem by fighting another battle with a different team. Was able to heal the lot afterwards

The healing bug occurred because your units were considered reserved for battle. This will not happen again after the next patch.

Thank you for reporting.
Xargos