This is 100% reproduceable.
Attack something so that you get the selection window for Auto / Tactical battle.
Do not choose one of these options. Instead, press ESC and leave the options window again.
Now you cannot move. cannot attack, cannot end turn.
I called it a semi-lockup because it only locks up the gamestate.
It doesn't lock up the engine so you can save / reload at this point, which fixes the issue.
It's not new with 1.09. It has also happened before that.
