Clicking on a characters portrait while having a party member selected will also move that party member to the location underneath the portrait.
How to reproduce:
Start new game.
Select a party member or members.
Right click portrait to open up character information screen.
Close character information screen. Party members who are selected will now move to the location clicked by the mouse.
What is wrong/ what should happen:
Character information screen should open without a concurrent "move" order being made.
I don't think you need any files. Let me know if you do.