There is some weird issue I noticed since 8.1.5 patch release. I use broker everything addon and it's module called gps never used to show tooltips (which was as it should be). Now when I mouseover items that I have on other chars (like cloak or ring that teleports somewhere) it shows weird icons of classes of my chars that also have those items. This wasn't happening earlier. I found it's caused by bagnons show tooltip item count. It doesn't show on hearthstones and whistle, only on rings and cloak. Normal tooltips on items in bag/clicked items from chat work fine. But these "tooltips" shouldn't be there.
Also Pawn addon started to show similar problem with showing spec icon tooltips in the same manner so I guess it's something with the new wow update. Images are below.

Bonus: Some times the icons get really big also and look like this: