[Bug] Perception Trigger Device plays undisableable detection sound on activation and line-of-sight events

AlreadyUsed333
Thu, 16 Apr 2026 17:51:14 +0000
Issues and Bug Reporting

Summary

The Perception Trigger Device emits an audio cue whenever a player looks at the device, the device detects a player, or the device is activated. This sound cannot be suppressed through any currently exposed control surface.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Devices

Steps to Reproduce

Place a Perception Trigger Device in the level.
Run the experience and enter the device’s detection range or line-of-sight cone.
Observe: a sound plays on detection/activation.
Attempt to disable sound via:

Device property panel → Sound FX options (disable/mute)
Internal audio components → set volume to 0

Run again. Sound still plays.

Expected Result

Expected Behavior
At minimum one of the above methods should suppress the audio. Ideally, a dedicated Enable Sound FX boolean property should exist and, when set to false, fully silence the device.
Actual Behavior
Sound plays unconditionally on every trigger event regardless of any sound-related settings applied through the device UI or its audio components.
Workaround
None found.
Impact
Blocks any experience design that requires silent perception-based detection (stealth mechanics, cutscenes, ambient AI logic, etc.).

Observed Result

The sound plays either way.

Platform(s)

Unreal Engine for Fortnite

Island Code

4839-6132-0747

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Video

BUG PERCCEPTION TRIGGER

7 posts - 6 participants