Unreal Engine Issues

Android sessions do not appear in Session Frontend

Crash when using "Convert to Seeded" on a Cascade Module

Crash when using "Convert to Seeded" on a Particle System Cascade module This is a Regression as it does not occur in 4.10 Error message: Assertion failed: *Offset < (uint32)InstancePayloadSize [ ...

Physics object resting on movable platforms have erratic physics behavior in 4.14

Physics object resting on movable platforms have erratic physics behavior in 4.14. This is a regression from 4.13.2-3172292 User Description: When placing more than 10 or 20 blocks on a moving pl ...

Crash on PIE exit after dynamically enabling and disabling tick functions through the Level Script blueprint.

User reports hitting an assertion due to invalid FTickTaskManager state when game is attempting to unregister a tick function that was previously disabled dynamically. Failed assertion is in FTickT ...

Unable to Save or Close Editor after Copying .FBX to Content Folder via Project Directory

The editor is not allowing users to save or close a project after an .FBX file has been copied to the project's Content directory and allowing the Content Browser to discover the change in source fi ...

Chaos Clothing CreateClothActor takes a long time with LODs and Self-Collision

Spawning an actor with Chaos cloth causes a hitch when LODs or Self-Collision are enabled on the cloth. LODs and Self-Collision seem to compound the issue. Self-Collision requires a collision simul ...

Enabling Merge GC Clusters and Blueprint Clustering causes a packaged Window project to crash

Enabling the check boxes for Merge GC Clusters and Blueprint Clustering causes packaged Windows projects to crash on startup. The log and dump files regarding this crash have been attached to this t ...

[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync

Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...

Sequencer Media Tracks trigger crash when an ImageSource is added

The same callstack appears in 4.24.3 (CL-11590370) but only when playing a Sequence with a Media Track that has a ImgMediaSource and Media Texture set on it. These repro steps work for 4.25 and 4.26 ...

Users project crashes when opening level that loads multiple sub-levels

Users project crashes when opening level that loads multiple sub-levels. Unable to reproduce this in a clean project so the users project is provided though Epic's box account (link is in the repro ...