Hello, UI writers. Make that bar not be one invisible pixel column, but rather about the 5 pixels of the red draggable bar that got me in trouble in the first place.
Normally it is. Something has bugged out in your client that this bar was able to be shifted to somewhere it shouldn't be able to.
When I try to shift that draggable bar as far to the side I can, it remains bound to the UI element and will at best just sit at the end of the action bar. Meaning it is always visible and so I can always just drag in back across whenever I need/want to.
As such, it seems prudent to make a bug report so they can look into it (That is, if this isn't due to any UI altering mods)
