Just checked.
Version is 9.0.5 and panel is on right (as default) and “[ ]Check if side panel is on the left” is not checked.
In my particular case the [add] and [Remove] button does not work with the “click” command. It is ignoring it. And I try to remove a selected member. To do so I:
Select a member from the right “selected Members” window
Press [SHIFT]+[TAB] to mark the “remove Arrow”
Press [Enter]
Click [Save] button
XClick is not a solution. So I can’t use this as a work around.
It does work perfectly with Kantu as a separated IDE window but not inside the side bar. There is no selection visible on XType that I see if I have Kantu outside the web browser.