Hi.
Tooltip icon on default frames has higher "z-index" over default interface "windows".

My case:
if i open map and hover my mouse pointer over the place where player frame lies (but "underneath" the map) with BD icon active, it happens that this buff/debuff tooltip is shown instead of that particular window object i hovered.
Same thing happens with achievement window.

Screens:


Red circles are pointer locations.

So as you can see on screens i hover over instance entrance and instead of "this is instance entrance" tooltip i see "Defensive stance" tooltip.

#142 can be similar at some point