Changing UPROPERTY() settings causes detail components to vanish in editor

Tools - Mar 11, 2015

When a UPROPERTY() macro is changed and the recompiled, the hot reload in the editor will cause any BP based on the class to lose certain aspects of the Detail panel such as the actor's transform. ...

Using Bake Material Position Offset Into Collision causes landscape to have no collision

UE - LD & Modeling - Terrain - Landscape - Jan 13, 2016

Creating a material with World Position Offset and enabling "Bake Material Position Offset Into Collision" causes the landscape to have no collision. Disabling this feature causes collision to come ...

Editor crashes when attempting to open a new level from a level that has an external curve in a timeline within the level blueprint

UE - Gameplay - Blueprint - Oct 27, 2014

The editor crashes when a user imports a float curve into a timeline within the level blueprint then attempts to open another level. ...

Delay nodes used in a macro cause subsequent macro calls during the delay to never complete

UE - Gameplay - Blueprint - Sep 6, 2016

Calling a macro that has a delay node again before the original call's delay could finish will cause the second call to be ignored when reaching the delay node. This did not occur in 4.12.5 and is n ...

Collision Preset Cannot Be Changed On an Actor Containing a Scaled Root Component

UE - Gameplay - Jan 15, 2016

In an actor that contains a scaled root component, it is not possible to change the collision presets on an instance of that actor if you are using the Viewport's Details panel. However, in the blue ...

Cannot reference Branch point in CharacterAnimBP event graph

OLD - Anim - Dec 22, 2014

In CharacterAnimBP: After creating a new montage branch point you cannot reference it in the CharacterAnimBP’s Event graph until you close and restart the editor. ...

Crash when opening a blueprint that referenced a struct blueprint that no longer exists

UE - Gameplay - Blueprint - May 28, 2015

If a user creates a struct blueprint then references it in another blueprint and then deletes the struct while the editor is closed, the referencing blueprint will crash when opened. ...

Cannot change the Strength value on a Physics Constraint in the Viewport Details panel

UE - Simulation - Physics - Jan 5, 2017

Cannot change the Strength value on a Physics Constraint to anything other than the default value in the Viewport Details panel. When changed the editor will pause and replace the value with — This ...

Incorrect collision of merged actor that was merged from a Spline Mesh Component

UE - Simulation - Physics - Apr 10, 2017

Incorrect collision of merged actor that was merged from a Spline Mesh Component Licensee description: We often use spline mesh blueprints to generate organic art for us, like roots, trees, and r ...

Deleting animation key values of ParagonKhaimera's 1D BlendSpace while the animation is previewing in Animation Editor will result in Engine crash

OLD - Anim - Jan 30, 2019

Deleting ParagonKhaimera BlendSpace 1D key values while the animation is previewing in Animation Editor will result in Engine crash. ...