Flickering of UI when scrolling, or hovering on and off 5.3.1 with video example

Hey all,

We're seeing an issue in a test build on OSX, but not in the editor. We are using asset bundles.

As you can see when one hovers over any of the buttons on the toolbar it's as if all of the sprites quickly scrambled through other sprites on an atlas? It's very pronounced when scrolling in the field guide view, you'll see at the beginning of the video.

https://dl.dropboxusercontent.com/u/732448/atlasflicker.mov

 

Did you ever find out what was happening? I'm having this same issue.