This has been going on since the last major patch before this one.. I think the one that gave us the B-29.
In this case a bunch of us were upping at once from a CV (during FSO) and I get the airplanes being inside one another bit but the artificial horizon sticks out in front of everything. This also happens with clipboards and several other things.. kind of like its background priority is messed up. Anyway it's no biggie just very annoying!
This happens with all planes on all maps:
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