Team fight tactics game breaking bug in patch 14.18b. Moved a unit and now I have 10 / 9 units?!?!

After the round I moved Zilean out of the back row and now it shows I have 10 / 9 units.
I have to move 1 to the bench and I lose the round, yet the round continues until a draw because the game thinks I have 1 more imaginary unit somehow.