Can happen anywhere, regardless of what you're doing.
Raiding, World Quests, Dungeons etc
Code:
37x [ADDON_ACTION_BLOCKED] AddOn 'nibRealUI' tried to call the protected function '<unnamed>:Hide()'.
!BugGrabber\BugGrabber.lua:573: in function <!BugGrabber\BugGrabber.lua:573>
[C]:: in function 'Hide'
FrameXML\WorldMapActionButton.lua:58: in function 'Clear'
FrameXML\WorldMapActionButton.lua:67: in function 'Refresh'
FrameXML\WorldMapActionButton.lua:19: in function 'SetMapAreaID'
FrameXML\WorldMapFrame.lua:418: in function <FrameXML\WorldMapFrame.lua:381>
[C]:: ?
[C]:: in function 'Hide'
FrameXML\UIParent.lua:2358: in function 'SetUIPanel'
FrameXML\UIParent.lua:2385: in function 'MoveUIPanel'
FrameXML\UIParent.lua:2416: in function 'HideUIPanel'
FrameXML\UIParent.lua:2090: in function <FrameXML\UIParent.lua:2082>
[C]:: in function 'SetAttribute'
FrameXML\UIParent.lua:2884: in function 'HideUIPanel'
FrameXML\UIParent.lua:2850: in function 'ToggleFrame'
FrameXML\WorldMapFrame.lua:242: in function 'ToggleWorldMap'
[string "TOGGLEWORLDMAP"]:1: in function <[string "TOGGLEWORLDMAP"]:1>