Unreal Engine Issues

Mac Crashing on Editor Launch

User reporting he is crashing when launching the Editor "This is a 4.9.1 binary build (latest), I can't give you the exact version because it crashes on the initialisation stage at 0%. The system i ...

Crashes in movie player on Android

There are a number of reported movie crash issues, but this report likely covers the main cause. Garbage collection changed in Android 4.0 and we are triggering a check that does not happen with ba ...

Freeze occurs after some time when tick group is set to TG_PostUpdateWork on a class

Multiple users have reported an issue where their packaged games are freezing after an indeterminate period of time. The reproduction steps and logs of each user are different but the reproduction s ...

The IndirectLightingSHSingleCoefficient for translucency on mobile is too bright

Muting the top most track row is muting all track rows

The workflow above is generally used to pull out key poses from a mocap performance. It works on 5.0. It can be simplified for QC into this:add some animation keys to your rigged character in Sequ ...

[AI] FInstancedStruct is not dupilicated properly if values are different from an Actor's defaults

A licensee reports that the values of an FInstancedStruct do not get properly duplicated if they differ from the default values of the Actor or TArray to which they belong. Possible short-term wo ...

Editor crashes when importing alembic asset

Editor crashes when importing Alembic material asset. The editor will crash once selecting the asset in Windows explorer, before the Import Options window appears. When testing this, we had an ave ...

Incorrect tooltip message when dragging a component from the tree to the graph

REGRESSION: Yes, does not occur in 4.17 When dragging a blueprint component from the Component tree into the graph, user receives an incorrect tooltip message (same one if they attempt an incorrect ...

Device Token can not be Acquired When Remote Notification on iOS

I received a report that there is a situation in UE 4.21 that it is not possible to acquire push notification device token on iOS And they seem to have solved the problem by fixing the following pa ...

SynthComponent does not execute OnStop() after calling Stop()

SynthComponent does not execute OnStop() after calling Stop(). OnStop() will be called in PumpPendingMessages() via OnGeneratePCMAudio(). But after stopping the AudioComponent, the procedural Sound ...