When I click on the stance button for Eder, the popup of the stances to choose from appears above. But as soon as I move the mouse to select the new stance, it disappears so I am unable to change stance.
Complicating things is it has worked a few times for reasons I'm not sure of, which makes me think I might be an idiot and missing something obvious. I've tried things like double clicking, clicking and holding and such and nothing consistently works.