Unreal Engine Issues
Unreal Engine Issues
Select button does not show up after the "Pick Parent Class" window loses focus
UE - Gameplay - Blueprint - May 1, 2017If the "Pick Parent Class" window loses focus, the select button will not be available for the previously selected option ...
Editor crashes on launch after hot reload with multiple modules
Tools - Feb 16, 2017The editor will crash on open after a hot reload if there are multiple modules in the project. Regression: No - behavior also occurs on 4.14.3 (CL 3249277) Workaround: Compiling with the editor clo ...
Project breaks if Online Subsystem plugin is disabled
UE - Foundation - Core - Apr 25, 2017Disabling Online Subsystem prevents the project from loading. On Windows, this produces an error shown in attached screenshot. On Linux, this causes a crash with the attached callstack on project ...
Iris - large fast arrays serialize multiple elements when only one is dirtied
UE - Networking - Iris - Apr 8, 2025This seems to be a result of how the changemask is handled for fast arrays. Because the changemask is a fixed set of bits (defined by IrisFastArrayChangeMaskBits), a single bit can represent multipl ...
Can't save map warning with Create Dynamic Material Instance node using wrong input
UE - Gameplay - Blueprint - Dec 18, 2015When using a Create Dynamic Material Instance node the Get Material node will plug into the World Context Object rather than the Parent input. This will cause a error to be thrown that does not allo ...
"Invalid resource entry creating uniform buffer" when running Vulkan on Mobile
UE - Platform - Mobile - Apr 30, 2019Android projects in 4.22.1 crash on launch with Vulkan enabled. Did NOT reproduce in 4.23 MAIN at CL 6156332 4.22.1 release CL is the same as a related fix for this ( [Link Removed] ) ...
Changing a node to a pure function does not remove breakpoints from node and they must be turned into an impure function again
UE - Gameplay - Blueprint - Aug 19, 2015Changing a blueprint node to a pure function while a breakpoint is set on the node will maintain the breakpoint. Additionally, the breakpoint cannot be toggled or removed until the node is turned ba ...
Output warning log when import .paper2dsprites file
UE - Gameplay - Paper2D - Nov 21, 2020When import .paper2dsprites file, always output warning log. It seems missmatch URL TexturePackerPrefix and AppName with metadata. - PaperJsonSpriteSheetImporter.cpp const FString TexturePacke ...
When re-categorizing variables within a blueprint collapsed categories pop open
UE - Gameplay - Blueprint - Mar 23, 2015If a user wants to change the category of a variable this will cause other categories that had previously been collapsed down for convenience to spring back open. This can make dragging and dropping ...
Editor freezes on load with default pawn set in gamemode class and cast node
UE - Foundation - Core - Oct 27, 2016When a GameMode class defines the default pawn class as a character blueprint, and the character blueprint contains a cast node to a blueprint based on the GameMode class, the project will freeze be ...