Unreal Engine Issues
Unreal Engine Issues
Actor blueprint 'bOptimizeBPComponentData' breaks subobject instantiation for runtime spawned actors in cooked builds
UE - Framework - Blueprint Runtime - Aug 29, 2024A user has reported that when an actor blueprint enables Generate Optimized Component Blueprint Data, default instanced objects of components are not properly duplicated in cooked builds. This resul ...
Occasional crash when attempting to in-app purchase on Android device
UE - Online - Apr 21, 2021App is frequently terminated with a NullPointerException when attempt to request in-app purchase. It is assumed that product information cannot be retrieved if there is no Google account logged in t ...
Blueprint class's property is overridden by parent blueprint class
UE - Gameplay - Components - Nov 2, 2020I did some research. The problem is caused in CoreNative.cpp. In Function GetInstancedSubobject (Line 126) We should check if instance is runtime instance first. If it is runtime instance, just us ...
Editor crash when using Animation BP pose watch
OLD - Anim - Apr 7, 2020We encountered a crash when using Anim BP Pose Watches to inspect poses on actors in a PIE instance. Specifically it seems ending the PIE session while the Anim BP is still watching the actor in the ...
Crash in UDataTable::RemoveRow(FName RowName)
UE - CoreTech - Jun 13, 2025This is a regression, the crash seem to have been introduced by CL 40129784 on ue5-main and persists in latest. Function UDataTable::RemoveRow(FName RowName) uses macro DATATABLE_CHANGE_SCOPE_SINGL ...
BlueprintGetter does not work with or disable AnimGraph Fast Path
OLD - Anim - Jan 23, 2020When used as part of the fast path in an ABP, variable Blueprint Getters are not used. If something with a getter that does not conform to or is supported by fast path, is used then fast path should ...
DefaultToSelf on a TScriptInterface parameter does not default correctly
UE - Gameplay - Blueprint - Aug 31, 2020This issue seems to stem from the incorrect constructor being called for TScriptInterface, so the correct Interface pointer does not get called. If you explicitly connect a reference to "Self" to ...
[CrashReport] UE4Editor_BlueprintCompilerCppBackend!FEmitDefaultValueHelper::HandleInstancedSubobject() [blueprintcompilercppbackendvaluehelper.cpp:2148]
UE - Gameplay - Blueprint Compiler - Mar 20, 2018No user comments in crash group 2143 // We should always be the one creating an instance in this case. 2144 check(bCreateInstance); 2145 2146 // Dummy object tha ...
Changing blueprint default values inside arrays only updates loaded child blueprints
UE - CoreTech - Jul 30, 2020The rules for delta serialization in UE4 are complicated, and the editor tries to hide them from you, which works 90% of the time but can lead to confusion and data loss in other situations. In the ...
changing localization does not change text in PIE
Tools - Sep 10, 2015When switching localization for testing, text does not change language in PIE. ...