Unreal Engine Issues

[CrashReport] Assertion failed: OLEReferenceCount == 0 in UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindows_Private()

This is a regular and longstanding crash in 4.17 that has occurred since at least 4.14. Users have not provided any descriptions of their actions when the crash occurred. There has been some previo ...

iOS Show External Login UI Blueprint Node fails on new iOS devices

I have been trying to test iOS online subsystem functionality for my game and thought that this blueprint node was just broken. This bug will probably catch many UE4 developers that are new to iOS b ...

Static Mesh imported from USD file has empty UV channel

When importing static mesh from USD file then it has the wrong amount of UV channels. Selecting a UV channel shows an empty area in the viewport. Regression: YES - not reproduced in 4.25.3 produc ...

AllowCommandletRendering D3D12 device crash

Forward Rendering causes Volumetric Material to not render against background

Regression: Tested in UE5/Release-5.0, and the issue is reproduceable. This issue appears to occur when the SkySphere is deleted from the level, as leaving the SkySphere in the level causes the Vol ...

[MetaSounds] - Trigger inputs called by Execute Trigger Parameter refire on MetaSounds that become active after virtualization

If trigger execute is called in Blueprint, it will fire every time the sound recovers from being virtual, even if it has not been called again. See video example: [Link Removed] Also occurs in Re ...

OnSmartLinkReached Event Not Firing in PIE

The OnSmartLinkReached event is not firing in PIE. This is a regression. In 4.12.5 the event fires as expected. Found in 4.13.0 CL 3106830 Reproduced in 4.14 Main CL 3129233. ...

Client crash on seamless travel in DataReplication with lag

When server traveling, client may crash due to lag while attempting to replicate object/property. ...

Variable Reset on Child in level

For a child instance inside of the level, the value of a parent int variable will reset if you add a new variable in the child and if there is a function in the parent that has the child as an outpu ...

If Pause Event is played in second half of Fixed Frame Interval, you can't resume playing

If Pause Event is played in second half of Fixed Frame Interval, you can't resume playing. Pause event appears to fire again when trying to resume playback. To expand on the summary, if you have a ...