Note for developer: It might just be an "image" and not real gui elements. For animating the popup, the controller is copied into an image that is animated. For some reasons, maybe that image failed to be hidden.
Maybe it can be that switching application while opening the popup results in zombie images.

This still happens on all the windows machines we have tested.

Here's a very simple way to reproduce it:

• load any volume data
• mouse over the push pin so the slice controller popup appears
• mouse away and all is fine, but if you instead pick a popup menu like orientation or node select then a leftover image is there when you mouse away (you see that popup is scrolling away, but leave "after image" behind).

Tried this with nightly build of 2018-06-18 :

COULD replicate on windows 7 64 with NVIDIA Quadro FX 3450/4000 SDI accessed via remote desktop client. I will try this machine later today without remote desktop to see if that is related.

Could NOT replicate the issue on windows 7 64 with NVIDIA Quadro FX 1800M, directly accessing the laptop.

Note: Will re-target to 4.4 if resolving issue 0003118 doesn't fix this one.

Testing without remote desktop I could NOT reproduce.

However the issue IS reproducible when accessing via a remote desktop so there is definitely still something wrong. Fixing the remote desktop use case is not strictly required, but I'd have a lot more confidence in the fix if it worked in all normal windows use cases. Specifically, the BWH neurosurgery group (Isaiah) uses remote desktop a lot.

Issue 0003118 is more serious and should definitely be resolved before we do the release IMO.

Works!