Button input is ignored when toggling Input mode from UI to Game

UE - Gameplay - Input - Oct 31, 2018

IE_Released is called when switching between the Game and UI input modes, despite the button being still held. Tested in 4.19.2 (CL - 4033788), 4.20.3 (CL - 4369336), 4.21 (CL - 4527422), 4.22 (C ...

Niagara - When editing a Niagara Function or Module Script, the "Apply" button on the toolbar never gets disabled if "expose as pin" is checked on any static switch node.

UE - Niagara - Apr 7, 2025

Consider a Niagara Function or Module Script containing a Static Switch node. If the "Expose as Pin" option is enabled for its selector variable, the "Apply" button on the graph editor's toolbar wil ...

Renaming Blackboard Key Not Updating Behavior Tree References

UE - AI - May 17, 2016

When renaming a blackboard key using the Entry Name box in the key's details panel, the names of the references in the behavior tree are not updated automatically. This is inconsistent behavior be ...

Check box appears darker when wrapping it with a button

UE - Editor - UI Systems - Oct 9, 2017

Check box appears darker when wrapping it with a button (almost black), This does not appear to happen when wrapped with other widgets. ...

Reset Emitter button in blueprint emitter component has no effect

UE - Gameplay - Blueprint - May 21, 2015

After setting a particle system component inside blueprint, clicking the "Reset Emitter" button in the details panel does not have any effect on the particle system. ...

Simulate motion vectors can fail on camera cuts

zComponent - Archive - Jun 11, 2024

r.MotionVectorSimulation 1 should simulate motion vectors when cutting cameras, but this appears to be broken on some loops. ...

Update Source button does not update the PoseAsset in Persona

OLD - Anim - Aug 4, 2016

Update Source button is not updating the PoseAsset that was created from the animation sequence. ...

Key frames from widget animations are not removed from the timeline when a widget is deleted

UE - Editor - UI Systems - Mar 5, 2015

If the user creates a widget and adds an animation for this widget and then deletes the widget the key frames will not be removed from the animation timeline. ...

Localization Preview Button in Widget Editor does not appear to work

UE - Editor - UI Systems - Oct 3, 2019

The button used to toggle a localization preview in the UMG designer tab does not appear to have an effect on any of the text in the designer tab. ...

For a TMap with C++ enum keys, deleting and re-adding a map entry in the Editor can corrupt the map data.

UE - Editor - Jul 19, 2024

When adding an entry to a TMap using UE's property editors, in most cases the new entry comes with a default-initialized key (if such key already exists, the insertion fails). The case of a UENUM de ...