Unreal Engine Issues

Copy/pasting component results in broken duplicate component (named _GEN_VARIABLE)

REGRESSION: Yes. Does not occur in 4.16.3 Using Copy/Paste to duplicate a component will result in a broken duplicate component. This doesn't occur if the user uses Ctrl+W to duplicate. On compi ...

Level Sequence option "Allow Level Edits Only" causes Frame Rate drop when used

When using the new option "Allow Level Edits Only" there is a drastic frame rate drop while playing the sequencer. This frame rate drops when only using this option. Versions Tested: 4.16.3 - CL: 3 ...

Crash When Toggling Visibility of Level with Planar Reflection

This crash occurs in 4.19 and 4.20 but not 4.18. Repro'd in 4.19.0-3944462 and 4.20.0-3955769 and 3964322. This is a regression. Per UDN licensee: When I'm showing/hiding levels in editor (in le ...

Behavior Tree has missing Service Nodes on project load

In the project is Behavior Tree that implements some tasks, decorators and services, but for some reason, two of my tasks nodes gets initialized with all the pointers to their services set to null, ...

Compile error when Blueprint Interface returns a map type variable

A Blueprint Interface function that returns a map type variable will fail compiling with various errors when called in another Blueprint. If the same function is setup in the Actor Blueprint instead ...

Imported Texture shows up black in Content Browser

I'm trying to import a .exr texture created in Substance Painter and exported as a 32 bit linear exr file. The texture is to be used for roughness. However, I've stumbled upon the problem that users ...

Layered blend per bone node with blend mask setting in an animation BP will not work after restarting UE editor, until recompiling the anim BP manually.

Media Playback - PNG Image Sequence Crashes Editor

The attached 105 frame PNG image sequence ( 1920x1080 w/alpha ) crashes the editor in UE 5.3 and 5.4 when played in the media player or in a MediaPlate.   The same image sequence does not crash the ...

FILTER_COMMANDLINE_LOGGING cannot be used without forcing UE_COMMAND_LINE_USES_ALLOW_LIST

There's two ways to affect the commandline in CommandLine.cpp: FILTER_COMMANDLINE_LOGGING - for filtering certain or all args (if left empty) from the log. UE_COMMAND_LINE_USES_ALLOW_LIST - for on ...

xDatasmith Direct Link models relocate on sync

Reported by multiple users. Models imported through Datasmith Direct Link can be relocated after a sync, despite no edits to the geometry's location in the DCC program. Currently reported for both ...