Haven't seen this happen before, using the 2014-06-22 02:28 nightly. During a terror mission on the 3rd or 4th turn the hidden movement screen never goes away. Attached is the save, pressing the end turn button should result in some floaters shooting, then the never ending hidden movement screen. I am using a few mods, but nothing major. Disabling the mods and loading the save results in the same thing. I'm not sure if the save will be useful in any way but I figured it couldn't hurt to make a post about it.