Opening a new sequence can have SavePreAnimatedState and RestorePreAnimatedState called out of order

Anim - Sequencer - Nov 21, 2019

When switching to a sequence where the current time is not in the target view range the PreAnimatedState of the new sequence will be saved before restoring the PreAnimatedState of the old sequence.  ...

Changing reflection capture resolution after setting preview rendering level to Android ES3.1 crashes the editor

Rendering - Nov 20, 2019

Applying a new reflection capture resolution after changing Preview Rendering Level to Android ES3.1 results in crash. Tested in: 4.24 P3 CL#10283392    4.25CL#10303496 ...

Undo and ConstructionScript break the AttachChildren array

Gameplay - Components - Nov 14, 2019

Undo fills AttachChildren array with null by the undo serializer. After that, a construction script tries to remove child components from parent component's AttachChildren but it can't find its poi ...

Editor Crash when trying to get Color data from Vertex buffer

Rendering - Nov 6, 2019

When attempting to get the vertex color of an instance of of a static mesh that is painted after placing it in the World Viewport. The Editor crashes returning an "Unhandled Exception". The cause o ...

Hide Bone in constructor does not update world instances

Anim - Runtime - Nov 4, 2019

Hiding bones during construction is not properly displayed by level instances placed at editor time. Note that setting 'Update animation in editor' on the mesh and re-running the constructor script ...

Internal Compiler Error: Tried to create a property Crash in scope Beta_C, but another object (ObjectProperty /Game/Alpha.Alpha_C:Crash) already exists there.

Gameplay - Blueprint - Oct 31, 2019

After fixing the crash from [Link Removed] when compiling the child blueprint that has claimed the component name the parent was previously using without having compiled the parent, an internal comp ...

Gameplay Abilities CancelAllAbilities not working as expected

Gameplay - Oct 24, 2019

in AbilitySystemComponent_Abilities.cpp, line:844  CancelAllAbilities() does not appear to be working as expected.  There is a check before cancelling all abilities.  However, this check uses the Cl ...

Duplicating two nested components do not appear in the Component tree until the blueprint is compiled.

Gameplay - Components - Oct 23, 2019

REGRESSION: No, this occurs as far back as 4.22. Duplicating two nested components can result in the duplicates not being visible in the component tree in the blueprint editor until the user compil ...

Vertex Painting - Unexpected behaviour when painting Skeletal Mesh with Low Radius Brush

Tools - Oct 21, 2019

Unexpected behaviour when painting skeletal meshes with small radius brush. This does not occur with static meshes. Confirmed in 4.25 MAIN @ CL 9730599 ...

Instance Materials are not Created When Importing an FBX

Rendering - Oct 16, 2019

Instance Materials are not Created When Importing an FBX.  Found in 4.22 CL# 7053642, 4.23 CL# 8386587, 4.24 CL# 9551884, 4.25 CL# 9615021 ...