Unreal Engine Issues
Unreal Engine Issues
OnTextChanged not called for UEditableTextBox / UMultiLineEditableTextBox when text is set programmatically
UE - AI Workflows - UI Systems - UMG - Sep 29, 2025When calling SetText() on a UEditableTextBox or UMultiLineEditableTextBox, the OnTextChanged delegate is not triggered. This regression was first reported in UE 5.3 and acknowledged previously in UD ...
IsValidOrFixable can be false even when IsValid is true in RawMesh.cpp
UE - Graphics Features - Mar 14, 2016In RawMesh.cpp, there are two functions called IsValid and IsValidOrFixable. A user has reported that there may be an issue here where IsValid can be true while IsValidOrFixable is false. From look ...
[CrashReport] UE4Editor_SlateCore!IsResourceObjectValid() [drawelements.cpp:23]
Tools - Aug 2, 2018No user comments in crash group 18 FSlateShaderResourceManager* FSlateDataPayload::ResourceManager; 19 20 static bool IsResourceObjectValid(UObject*& InObject) 21 ...
Packaging a runtime plugin in a Blueprint project causes some Editor files to be deleted
UE - Foundation - Cpp Tools - Oct 22, 2018Attempting to package a runtime plugin (does not occur with a Development plugin) in a Blueprint project fails in 4.21 Preview 2. This also causes some Editor files to be deleted, including the Modu ...
Simulating physics overrides the ability to move Skeletal Mesh Actors in Editor after moving a child component
UE - Simulation - Physics - Jun 18, 2019Found in 4.22 CL#6574378 Reproduced in 4.21 CL#4753647, 4.24 Main CL#7062442 May be similar to [Link Removed], which was reported fixed in 4.13 The following warning is spammed when trying to mov ...
TArray64 RangeCheck prints the incorrect error messages for values over 32-bit length
UE - Core - Systems - Apr 27, 2022TArray64 RangeCheck prints the incorrect error messages for values over 32 bit. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did occur there, it is not a regressi ...
TArrayView64 RangeCheck prints the incorrect error messages for values over 32-bit length
UE - Core - Systems - Apr 29, 2022TArrayView64 RangeCheck prints the incorrect error messages for values over 32 bit. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did occur there, it is not a regre ...
Changing a variable type inside of a Structure does not always reset it's value to the default value causing "Cannot parse value" error
UE - Framework - Blueprint Compiler - May 11, 2022Changing a variable type inside of a Structure does not always reset it's default value causing "Cannot parse value" error. Upon changing the default value or adding another, different variable type ...
The Label field does not function for Editor Utility Tool Menu Entry
UE - AI Workflows - UI Systems - Nov 22, 2022Labels for buttons added to the Level Editor Toolbar from the Editor Utility Tool Menu Entry blueprint do not appear in the toolbar. This functionality did exist in 4.26/4.27 but no longer seems to ...
Duplicating functions doesn't reset the GUIDs of local variables.
UE - Gameplay - Jun 15, 2023This is actually a bug with function duplication via UEdGraphSchema_K2::DuplicateGraph. After a function graph is duplicated, the function entry node still retains the same GUIDs for its local vari ...