# Listening To Ranged Weapon Mapping Primary Fire Input Events Breaks Building Entirely On Mobile.

**URL:** <https://forums.unrealengine.com/t/listening-to-ranged-weapon-mapping-primary-fire-input-events-breaks-building-entirely-on-mobile/2843505>\
**Category:** Issues and Bug Reporting\
**Tags:** Status-PeerReview, fortnite-creative, unreal-editor-for-fortnite, fortnite\
**Created:** [October 21, 2026, 10:59pm UTC](https://forums.unrealengine.com/t/listening-to-ranged-weapon-mapping-primary-fire-input-events-breaks-building-entirely-on-mobile/2843505 "2026-10-21T22:59:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jpt\_96](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Jpt\_96](https://forums.unrealengine.com/u/Jpt_96)\
**Post date:** [October 21, 2026, 10:59pm UTC](https://forums.unrealengine.com/t/listening-to-ranged-weapon-mapping-primary-fire-input-events-breaks-building-entirely-on-mobile/2843505/1 "2026-10-21T22:59:14Z")

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### Summary

The following snippet removes the ability to place builds on mobile.

Device Tested : iPhone 17 Pro Max

```auto
CallbackWhenFirePressed<public>(Player:player, Callback:type{func(:player):void})<suspends>:void=
    if(PlayerInput := GetPlayerInput[Player]):
        PrimaryInput := PlayerInput.GetInputEvents(WeaponPrimary)
        ActivatedEvent : listenable(tuple(player, logic)) = PrimaryInput.TriggerActivationEvent
        loop:
             ActivationResult := ActivatedEvent.Await()(1)
             if(ActivationResult?):
                 Callback(Player)
         

```

When awaiting this event, the on screen button to place builds goes away.

### Please select what you are reporting on:

Verse

### What Type of Bug are you experiencing?

Stability

### Steps to Reproduce

-Write a callback  
-Paste function in a creative device  
-OnBegin spawn the method with the callback  
-Launch Session with the 17 Pro as the selected in mobile preview ( or connect to platform with your mobile device )

### Expected Result

For expected on screen buttons to show up

### Observed Result

Expected on screen buttons missing

### Platform(s)

Mobile ( Only tested iOS )

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<div class="post-metadata">

**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\
**Post date:** [November 13, 2026, 2:00am UTC](https://forums.unrealengine.com/t/listening-to-ranged-weapon-mapping-primary-fire-input-events-breaks-building-entirely-on-mobile/2843505/6 "2026-11-13T02:00:32Z")

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FORT-1178047’s status has changed to ’Needs Peer Review’. A fix has been submitted, and is awaiting review by another team member.