Game-style Editor Movement+Save=Move backwards stuck

This is a rather trivial issue, but I’ve kept running into it while working on some ArchViz lately…and it gets slightly annoying really quick if you do it all the time:

  1. Hold RMB and use the Game-style WASD Movement to move around in the scene
  2. Modify things (anything that marks the scene as modified goes)
  3. Hold RMB and move around again, as before
  4. Hit Ctrl+S to save the changes when you’re satisfied - do this while RMB is still down (or barely being released while the save happens)
  5. Level saves as expected, but as soon as you enter Game-style WASD by holding RMB, you’re moving backwards automatically (as if the S key was down)

Plus, when I do this on 4.11p4 (exact version is 4.11.0-2858478+++UE4+Release-4.11, which i kinda doubt matters here) and try to select anything in a viewport, I get an Editor warning that simply says “” (nothing).

Here’s a gif showing both in action, in case it helps:

Hello ,

I was able reproduce this issue on our end. I have written up a report (UE-27619) and I have submitted it to the developers for further consideration. I will provide updates with any pertinent information as it becomes available. Thank you for your time and information.

Make it a great day