[UE5.4] Level Sequence stops immediately after starting

Development Cinematics & Media
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1

Hi everyone,

I’m experiencing a very frustrating issue with Level Sequences in UE5.4 and I’m completely stuck.

My Setup:

UE5.4
Brand new project (FPS Template)
Created a simple Level Sequence (5 seconds duration)
Called via Blueprint using "Create Level Sequence Player" → "Play To" nodes
Triggered by Y key press

The Problem:
When I press Y, the cinematic starts but stops immediately - I only get a quick flash of the sequence. The sequence should run for 5 seconds but stops after a fraction of a second.

What I’ve Verified:
:white_check_mark: The Level Sequence is exactly 5 seconds in edit mode
:white_check_mark: Green (start) and red (end) markers are properly positioned
:white_check_mark: Blueprint execution works (Print String before/after confirms the nodes execute)
:white_check_mark: The sequence plays perfectly in edit mode within the Sequencer

Additional Info:

  • This is a completely clean project (base FPS Template + my Level Sequence only)

  • Nothing else could interfere with this functionality

  • I've recorded a video of my session that clearly shows the problem

  • In the video, you can see the sequence works perfectly in edit mode

  • Then in simulation, when I press Y multiple times, you can see flashes on screen

  • These flashes are the Level Sequence starting and stopping immediately

Has anyone encountered this bug in 5.4? This should be basic functionality but it’s not working at all.

Thanks in advance for any help!

LevelSQissue.wmv (23.4 MB)