When I click in combat next to an enemy unit, then 50% of the time the game decides for my unit to attack the neighbour, even if my intention is to defend (No it is not because I am clicking on the enemy unit, I have taken extra care not to hit them when this happens)
Usually when it happens, it stays the entire fight.
I have little means to support any proper info on this bug, so I will also ask if anyone have any bright ideas how to report this highly annoying issue, that basicly breaks the idea of tactical combat by taking my options away from me.
Edit: Forgot to put in the title 
Edit 2: And put it in the right forum... Duh
Sincerely
~ Kongdej