Unreal Engine Issues

Blueprint derived from C++ class not saving correctly

The blueprint that the user is using loses some data when the editor closes and reopens despite saving all of the content. Note: Currently unsure of what exactly causes this but as I am able to rep ...

Dynamically binding 'OnComponent' functions in code doesn't trigger bound functions

Binding a function in code to OnComponentBeginOverlap, OnComponentEndOverlap, or OnComponentHit does not trigger the bound function from code. ...

Changing blueprint default values inside arrays only updates loaded child blueprints

The rules for delta serialization in UE4 are complicated, and the editor tries to hide them from you, which works 90% of the time but can lead to confusion and data loss in other situations. In the ...

Masked Mesh has significant performance hit on some android devices

Blueprint compile fails after changing the default values of a struct that is part of another struct that makes up a Data Table that is used within the Blueprint.

Changing the default value of a struct that is included as an array in another struct can prevent any Blueprints that use a DataTable made from the second struct from compiling. It appears to be a p ...

UnrealHeaderTool is always executed in a Code Project from an InstalledBuild

UnrealHeaderTool is always executed in a Code Project from an InstalledBuild Discovered during the verification of [Link Removed], as stated when verifying that issue, this issue only occurs in Bin ...

Local binary build fails with iOS platform included

This report is very similar to [Link Removed] (the command line used to run the build is slightly different), but the build fails with a different error. In this case, a source file is being looked ...

Tilemaps with masked materials respond to lighting at incorrect directions

Tilemaps using lit methods of rendering are subject to strange lighting behavior. If the material for the tilemap is using a 'masked' method of rendering.  Lighting will appear at incorrect angles. ...

Memory Leak When Raytracing Enabled with Specific Rendering Settings

When a shipping build is packaged using specific rendering settings a memory leak can be observed. The licensee has noted that this leak presents as a 10MB per hour increase in RAM usage. It has a ...

Packaging for DLC with plugin multiple times causes failure due to file path length

When the DLC is being built for a project and stored in a plugin, the result is normaly until the DLC is packaged multiple times. This leads to the file path becoming more and more nested each time. ...