Unreal Engine Issues

Cascade particle system crash when changing levels in a cooked game

Changing levels with an auto-released particle system will cause cooked builds to crash. This is a regression. This crash does not occur in 4.25 ...

Lumen ignores Landscape Holes (Landscape Visibility) when Hardware Ray Tracing is enabled and Ray Lighting Mode is set to Surface Cache

Context Lumen is the default global illumination and reflections system. Lumen renders diffuse interreflection with infinite bounces and indirect specular reflections in large, detailed environments ...

Project upgrade to 4.15 does not complete if the Runtime Mesh Component is installed in version 4.14 and not in 4.15

If the Runtime Mesh Component is installed in the 4.14 Binary Engine, upgrading a copy of a code project from 4.14 to 4.15, even if it does not use that plugin, will result in the upgrade process ha ...

Crash copying a Static Meshes primitive collision member and pasting it on another element

Crash copying a Static Meshes primitive collision member and pasting it on another element. The pasted element seems to need at least 2 members for the crash to occur. User description: Editor Cr ...

Rendering sequence with livelink data has issues with smooth engine offset

[Link Removed] for reference Playing back a sequence shouldn't have buffered samples. We should have a single one, which was built from the sequence. We need to make sure when played back that it ...

Warnings appear when playing a Sequence while in PIE

While executing [Link Removed] Sequencer - Recording - Basics - Template – attempting to view a recorded sequence while in PIE triggers a set of warnings each time the play button was pressed. LogUO ...

Level Streaming Blocking Loads Do Not Work

It is believed that If Should Block On Load is TRUE, the entire game should freeze up until the entire level is loaded. Then If Should Block On Load is FALSE, the game continues to play while the le ...

OnAudioPlacebackPercentage PlaybackPercentage (float) doesn't take into account "Start Time" from Play or FadeIn nodes

PlaybackPercent on the OnAudioPlaybackPercent event does not account for Start Offset from the Play or FadeIn node. Reported and tested in version 4.25.3 (CL-13942748) and version 4.24.3 (CL-115903 ...

Components attached to Camera doesn't receive late updates and "wobble"

Incorrect number of parameters in empty Shipping version of the DrawDebugString() function signature

The DrawDebugString() function has to versions. One is the actual function to display a string of debug text in non-Shipping builds, and the other is an empty function that is used in Shipping build ...