Unreal Engine Issues

PerInstanceRandom does not work on Instanced Static Meshes spawned at runtime

PerInstanceRandom does not provide a random value when the material is being used on an Instanced Static Mesh that is spawned at runtime, the value is always the same. Regression?: Yes This did not ...

Spring Arm rotation only prints Yaw after 4.17 conversion

Spring Arm rotation only prints Yaw after 4.17 conversion. In 4.16 it would print the Yaw, Pitch, and Rotation as expected. The spring arm by itself prints the rotation correctly but once a camera ...

Collection named 'NUL' is not recognized / saved.

When a collection is named NUL, it will appear in the editor but does not get saved when the editor shuts down. When the project is restarted, the NUL collection is removed. ...

Editor freezes when creating a Collection named 'AUX'

When a collection is created, naming the colleciton AUX causes the editor to lock up, requiring a force close from the task manager. Note: Naming the collection something else and then renaming it ...

Custom event parameter set to 0 by default

Default parameters do not appear to be retained for custom events. This was tested in 4.17 and the issue does not occur in 4.16. Appears to be a regression ...

Illegal names are accepted when creating a Content Browser Collection in code

When a Collection is created in code (see code snippet), the collection accepts names with illegal characters such as periods or spaces. Creating a collection through the editor properly warns that ...

Compiling Child Blueprint changes values in parent Blueprint

When Compiling a blueprint that is a child actor component to another blueprint, the value will be incorrectly displayed if the parent blueprint is also not compiled. Versions Tested 4.16.3 - CL: 3 ...

Enums in BP Structures display as Byte on Struct save

When an enum variable is added to a BP struct, saving the struct causes the enum to display its type as a Byte rather than the specified enum. Regression: Yes - This behavior does not occur in 4.16 ...

Memory usage regression in the editor caused by FArchiveAsync2 buffers

Owner No See option does not correctly apply to widgets using screen space

When using the Owner No See option with Widgets, if the widget is set to display on the screen rather than the world, then the option does not affect the widget as intended. Other forms of changing ...