Unreal Engine Issues

TMap does not serialize properly in specific circumstance when it contains a UObject property set to null by default

A TMap containing a struct with a UObject reference property (set to nullptr by default) does not serialize properly for an instance where the UObject reference is set on the instance, but the TMap ...

Find Session and Join Session to join a session over LAN on iOS is inconsistent and requires being run multiple times to work

Attempting to use Find Session / Join Session to join a LAN session on iOS results in inconsistent results, requiring the client to press the join button multiple times to join properly. Currently ...

Vertex Interpolate Node Doesn't Work with Lightmass

The vertex interpolate node doesn't work with lightmass. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4258917 ...

Crash upon attempting to load into session via Join Session in Blueprints on iOS

Joining a session on iOS using the Join Session node in Blueprints causes a crash on iOS. This is similar to [Link Removed] but was requested to be entered separately. This has not been reproduced ...

Not having sufficient permissions to save Rhino file after importing

When importing a Rhino 6 file that has a long filename, an error appears stating that there are insufficient permissions to save the file. ...

MeshEditor Crashes When Tool is Selected

MeshEditor Crashes When Tool is Selected. Found in 4.20 CL# 4233996 and 4.21 CL# 4258917 ...

Finish or Custom Event Tracks in a Timeline don't execute when 'Set New Time' is being used

When using Finish or Custom Event Tracks in a Timeline, they won't execute when 'Set New Time' is being used with another Timeline or Float value. This issue was reported and tested in 4.19.2 (CL ...

STEP file containing Instances are not imported in Unreal

Child Actors do not replicate to clients when running project with "-game" command

Child Actors do not replicated properly to clients when running a project using the "-game" commandline argument. This does functionality does work properly in PIE and in a cooked build however. Re ...

IOS binaries are not included when a plugin is packaged for IOS using a binary Engine installation

Packaging a plugin for the IOS platform on a Mac completes successfully, but there are no IOS binaries included in the packaged plugin. Once the package process completes, the packaged plugin only c ...