Since Gamepad input works without needing focus (which was added in 4.9 with [Link Removed]), a Gamepad's input will also affect all instances running on the same computer.

Regression?: No
This occurs in 4.20 and has been reported that it was occurring as far back as 4.9.

Steps to Reproduce
  1. Create a new project that takes input (ThirdPersonTemplate works)
  2. Run the following command at least twice:
     UE4Editor.exe <PathToProject> -game -Windowed -ResX=640 -ResY=480 
  3. Once the multiple instances of the game are up, use a gamepad (Xbox One pad was used to test) to move the character
    Result: The gamepad input affects all of the instances.
    Expected: The gamepad input only affects the focused instance.

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Won't Fix
ComponentUE - Editor - UI Systems - Slate
Affects Versions4.
CreatedMar 5, 2019
ResolvedAug 27, 2021
UpdatedAug 27, 2021