Using a vanilla build from the April 3 17:29:18 zip with default plugins.
To reproduce:
Alt-left click on a bunch of different items - this makes them stay up after the mouse is released. After 3-4 items, the last window to be brought up stays active, changing to whatever item you clicked on.
Any items you cycle through this last window will not have the added MQ2 info - value, tribute, lore, etc.
I can provide more information if needed.

