Unreal Engine Issues

User project crashes after changing struct

Adding a Blueprint Interface (with function named "Test") to a Widget Blueprint with a variable named "Test" crashes the editor when compiling

Giving the Blueprint Interface Function and the Widget Blueprint Variable the same name, then adding the Blueprint Interface to the Widget Blueprint, causes the editor to immediately crash when comp ...

Crash upon launching packaged game with Share Material Shader code enabled

When launching a packaged game that has Share Material Shader Code enabled, the process will crash before opening. Regression?: Yes This issue does not occur in 4.17.2-3658906+++UE4+Release-4.17 Th ...

Building Lighting fails when lightmass importance volume scale is large

There is an issue when attempting to build lighting with a large lightmass importance volume when you build the lighting the editor freezes. This issue appears to be a regression Versions tested: 4 ...

Generate Particle Event Blueprint node doesnt generate particles at relative "InLocation"

The EventReceiver Spawn module doesnt seem to take in parameters from linked Particle Generated Event. When setting the location of the Blueprint node (In Location), the relative position of the Par ...

Random Deviation of 0 causes service node instantiation fail

Licensee has 4 Services that aren't being initialized with their respective Tasks when they Plays in Editor. If the Behavior Tree is opened first, the warnings do not appear. All 4 of the Services h ...

Event Dispatcher implementation called several times (number of bound refs increases every compile)

The number of calls to the Event Dispatcher increase each time the blueprint actor containing the reference is compiled. This issue was not present in 4.18.3 (CL-3832480) but is in 4.19.2 (CL-403378 ...

When a Sublevel has "Initially Loaded" set to true and "Initially Visible" set to false, the Editor will crash after exiting PIE

If you have a sub level with "Initially Loaded" set to true and "Initially Visible" set to false it will crash after exiting PIE. This issue was reported and tested in 4.20.1 (CL-4233996). It has ...

Solidworks 2018 Virtual Parts aren't imported

When importing a Solidworks 2018 CAD assembly, if the part in the assembly is a virtual part (denoted by brackets in the feature tree), a part that exists only within the assembly, the part and rela ...

UCanvasPanelSlot::PostEditChangeChainProperty does not call Super function

UCanvasPanelSlot::PostEditChangeChainProperty not only does not call its Super function unless the anchor node has been set, but it calls Super:: PostEditChangeProperty instead PostEditChainProperty ...