[Bug] Mouse jump when hovering menu in PIE

Little issue I just noticed, I didn’t find a other post reporting it :

  • Build : UE4 - 4.14.0 (official github release) - Windows 7 x64
  • Description : Mouse jump to the viewmport when hovering a menu (like “File” or “Edit”)
  • Additional notes : It was working fine in 4.11.0, 4.12.0 and 4.13.0.
  • Repro steps :
  1. Create a simple project (TPS of FPS)
  2. Enable mouse capture by the game at focus
  3. Launch the game in editor mode (Play In Editor > PIE, not the simulate mode)
  4. Press Windows key to get back your mouse without exiting PIE
  5. Click on the Editor
  6. Mouse the mouse over the rest of the interface, navigate between menus

At step 6, the mouse will jump back to the nearest area of the viewport each time you over a new menu. This doesn’t happen when manipulating the rest of the interface.


Example GIF (I’m moving slowly the mouse in this example, it jumps by itself) :

115218-mouse_jump.gif