Unreal Engine Issues
Unreal Engine Issues
MRQ - MovieGraphEditorExample.py on_executor_finished_delegate not called in 5.6
UE - Virtual Production - Tools - MRQ - Jun 13, 2025From UDN: We are launching jobs using a modified version of MovieGraphEditorExample.py. In 5.5 everything works fine, but in 5.6 the on_executor_finished_delegate is never getting called when all th ...
HoloLens auto-enabling as a supported platform in 5.1
UE - Platform - XR - Mar 30, 2023https://udn.unrealengine.com/s/case/5004z00001n9MUWAA2/hololens-cannot-be-permanently-disabled-as-a-target-platform?fromCase=1 They disable hololens as a supported target platform, but it is enab ...
Struct array variables interpret multiple Structs as the same if they have the same values
UE - Gameplay - Blueprint - Jul 7, 2015Struct array variables interpret multiple Structs as the same if they have the same values. This does not occur if the values in the Structs added to the array are different. Test project in 4.8.1 ...
Soft angular constraints solve velocity like hard constraints
UE - Simulation - Core - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
Several issues with 4.25.1 and Win 7
UE - Graphics Features - Jun 22, 2020Users are reporting issues with the 4.25.1 hotfix and Win 7, including running cooked builds and the editor crashing: https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1755531 ...
SkyAtmosphere is not displayed in ES3.1 Preview
UE - Platform - Mobile - Feb 22, 2021Atmospheric Fog is not displayed as well. ...
FPS Perf Regression on 980
UE - Graphics Features - Mar 17, 2015At least one user has so far reported a noticeable drop in FPS from 4.6.1 to 4.7.2 in a heavy scene; using a GTX 980. I've reproduced a perf drop in a cooked 4.7 build of elemental demo compared to ...
Conflict between sequencer transform track and Parent Constraint from the Animation Mode breaks temporary pivot translation on any actor
UE - Anim - Anim in Engine - Jul 15, 2025Note: This affects all versions from at least UE 5.3, including mainline latest. The "Animation" Editor Mode allows creating constraints for level actors. One of these, the "Parent" constraint, con ...
Copy/Paste a data asset fields cause the fields to affect each other
Tools - Jul 7, 2016When an element of a data asset is copied into another field, the two fields become "linked" and further edits to one field begin to affect the other. ...
Using Start Players as Spectators checkbox does not affect Player0
UE - Gameplay - May 20, 2015When setting up a custom game mode blueprint, if the "Start Players as Spectators" checkbox is checked the first player loaded in PIE will not be in spectator mode. ...