Spawnable templates can reference other spawnables and their levels in a sequence

Anim - Sequencer - Jan 8, 2021

Spawnable templates can reference other spawnables. These references will be unstable due to the nature of spawnables, and the level reference can lead to unexpected behavior.  ...

DateTime Variable in Sub Widget resets on Compile

Tools - UMG - Jan 7, 2021

When attempting to set the default value of a date time in a sub widget the changes are not kept after compiling. ...

Enabling window animations causes dropdown menus to flicker and become unselectable

Tools - Slate - Jan 7, 2021

Not a regression as I was able to repro this in 4.25.4 The bug doesn't occur every single time, you may need to try disabling/re-enabling the setting and/or clicking on the menu dropdowns a few tim ...

Crash on project startup due to certain Skeletal Mesh being accessed

Anim - Runtime - Jan 6, 2021

If you open the 6 assets that were close unexpectedly it will crashEnemy (Blueprint), Player_BP (Blueprint) and ThirdPersonGameMode (Blueprint) it crashesThe texture and Projectile_Base (Blueprint) ar ...

Ensure in APlayerState::OnRep_bIsInactive may be hit

Networking - Jan 6, 2021

The ensure in APlayerState::OnRep_bIsInactive may be hit due to the player state being replicated before the game state. The check is necessary for making sure the game state is available, but the e ...

Cascade particle system crash when changing levels in a cooked game

Rendering - Cascade - Jan 6, 2021

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 ...

Cannot create FBXEportOption in blueprints

Anim - Sequencer - Jan 5, 2021

The class UFbxExportOption is not specified as a blueprint type, so it cannot be constructed in blueprints. This class is needed for exporting FBX files from a sequence, which means this functionali ...

Crash occurs when compiling in Editor after editing a C++ file

DevTools - Hot Reload - Jan 5, 2021

Crash seems inconsistent, doesn't seem to happen every time. You may have to change the variables and re-compile through the editor a few times to get it to trigger. The crash did occur for me when ...

Granular Synth crashes project when played in standalone or packaged with assertion failure

Audio - Jan 5, 2021

Assertion failed: SoundWave->GetPrecacheState() == ESoundWavePrecacheState::InProgress The above assertion fail was seen when played in standalone mode. Play-In-Editor mode (PIE) is working as exp ...

If use with mesh particles or use with niagara mesh particles is checked in the Usage flag of the material and the material domain is set to volume, compile error will occur.

Rendering - Niagara - Jan 5, 2021

[SM5] /Engine/Private/VolumetricCloud.usf(118,33-53): error X3018: invalid subscript 'VertexId' This is happening in VolumetricCloud.usf, but it seems that I can avoid the error by adding the follow ...