Unreal Engine Issues
Unreal Engine Issues
Calling SetNavigationRule for widgets at runtime does not update the Nav Rule
UE - Editor - UI Systems - Sep 25, 2017Calling SetNavigationRule at runtime does not update the widget navigation of the selected widget. Regression: No - same behavior occurs in 4.16.3 (CL 3561208) ...
Cannot add a non-static custom thunk to a code class
UE - Foundation - Cpp Tools - UnrealHeaderTool - May 7, 2018In 4.19, it is no longer possible to create a non-static custom thunk in a class. This was possible in 4.18.3. REGRESSION: Yes. ...
BeginPlay not called for Post-Process Anim Instance
OLD - Anim - Oct 29, 2019Post-Process Anim Instances do not have BeginPlay called. The proposed fix is to addif (PostProcessAnimInstance) { PostProcessAnimInstance->NativeBeginPlay(); PostProcessAnimInstance->Blu ...
Niagara module scripts "Map Get" node displays the 'Module' parameter as "Input"
UE - Niagara - Mar 9, 2020The module parameter in a niagara module script displays the incorrect name Tested: 4.24.3, 4.25P, 4.26 ...
Sequencer particle toggle tracks evaluate one extra frame
UE - Anim - Sequencer - Jul 1, 2020It looks like particle toggle tracks use TimeRangeToNumberRange which gives the incorrect range as a result of CL 10893518 which fixed [Link Removed]. ...
Deterministic cooking issue caused by ParticleModuleTypeDataGPU
UE - Niagara - Jan 18, 2021This problem is similar to the following case. [Link Removed] [Link Removed] It seems to have been fixed in 4.16, but the licensee reported it in 4.25. ...
Non-deterministic cooking issue in .uexp of level asset file
UE - Core - Data Pipeline - Cooker - Jan 17, 2023There is a deterministic cooking issue with .uexp map of level asset. [Link Removed] Closed is the similar issue fixing by ...
Can't connect Date Time and Time Spawn pins to math nodes
UE - Framework - Blueprint Editor - Feb 2, 2023we can do a "cheap fix" here by adding the "IgnoreTypePromotion" metadata to the date time functions, but there are some underlying issues with the FindBestMatching func in this case causing it to f ...
Light function materials using WorldPosition do not render correctly to volumetric fog if there is more than one
UE - Graphics Features - Mar 27, 2023There is a one-line fix for this in a shader file, see their PR on GitHub:https://github.com/EpicGames/UnrealEngine/pull/10251/files ...
Initialization error when creating FEventReply objects from Python
UE - AI Workflows - UI Systems - UMG - Nov 28, 2025the handled value passed to unlock_mouse is actually treated as unhandled, because FEventReply has no uproperty and no Identical()function of its own. Adding WithIdenticalViaEquality can fix this is ...