Enhanced Input Action does not trigger when bound to Space key (works on other keys)

[6041f44156fd4be8b0b2baad7488752c (yumi)]

Hey Guys, I’m a beginner learning Unreal Engine and the Enhanced Input system, and I ran into a confusing issue.

What I did (brief)

• Created an Input Action: IA_Celebrate

• In the Character Blueprint:

  • Connected IA_Celebrate → Started to a Print String node (prints “Celebrate”)

  • 
    

The issue

• When IA_Celebrate is mapped to the C key in the Input Mapping Context, “Celebrate” prints correctly.

• When the same Input Action is mapped to the Space key, nothing prints.

The Blueprint logic is unchanged — only the key binding is different.

Question

Why does an Enhanced Input Action work on other keys but not on Space?

[MajorT]

Enhanced Input usually consumes the input for any lower priority input actions.
Meaning there could be an Input Action that already uses the space bar and thus consumes the spacebar input, so your IA_Celebrate wont receive any input events.

You can check it out in-game by executing the console command ShowDebug EnhancedInput.

This will draw a visualized overview of all your input actions and triggers, which should give you a better idea where your inputs are going.

[E_Hamza_MB]

I haven’t fully reflected on the error yet, but you can provide a better debug interface by using the command “ShowDebug EnhancedInput”.

[tyconner]

Second this as the 99% likely cause of the issue