Unreal Engine Issues

Data Tables with 'ParticleSysParam' structs cause crash

Data Tables with 'Particle Sys Param' structs in them as variables will crash when opened. ...

Right click mirror option for scale is applied to all axes even when uniform scale is unlocked

When using the mirror (axis) option in the details panel, the mirroring behaves unexpectedly when the uniform scale is unlocked. ...

Resolution appears incorrect when using Windows Mixed reality Simulator

Resolution appears incorrect when using Windows Mixed reality Simulator. It appears to only take up around 1/4 the available screen space. ...

Unused Foliage Type Causing Unbuilt Lighting

Foliage components will be unbuilt even after deleting all of the placed foliage in a level. Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4827620 ...

Niagara systems always compile on load.

Navigation Mesh ignores Hierarchical Instanced Static Meshes using "Build Paths" or the "Build" Button

Hierarchical Instanced Static Meshes are partially ignored after building the navigation mesh. This is causing the navmesh to be generated within all or part the HISM instead of around it.  This ...

Hypotenuse node unexpectedly returns "-nan(ind)" instead of "0.0" if both values passed into the node are "0.0"

The Hypotenuse Blueprint node currently returns a value of "-nan(ind)" if both values passed into the node are "0.0". This result is correct based on the code that the Hypotenuse node uses, but is n ...

Widget blueprint details panel appears to jitter when dragging widgets in the designer tab

When clicking and dragging a widget in the designer tab of a widget blueprint some options in the details panel will begin to move/shake/jitter/readjust. ...

Crash entering PIE without Magic Leap SDK referencing delayhlp.cpp:323

Editor crash when PIEing without ML SDK installed on machine. This did not occur at the same CL on a P4 build. This did not occur on a machine with the ML SDK installed. Does not occur in //UE4/Re ...

Delete Assets dialog returns non-valid assets for the list of assets that can replace the references

The Delete Assets window's list of assets that are available to replace the references to an asset that is being deleted returns additional assets that are not valid replacements. The provided pro ...