Unreal Engine Issues
Unreal Engine Issues
World Condition FWorldConditionQuerySharedDefinition fails to Link in builds in Unreal Engine 5.7
UE - AI - Mar 1, 2026In FWorldConditionQuerySharedDefinition::PostSerialize, if (Ar.IsLoading() && SerializedObject != nullptr) the SerializedObject is currently only used for debug logging within Link() and is not ...
FindCollisionUV always returns False on Skeletal Meshes
UE - Gameplay - Dec 14, 2016FindCollisionUV always returns False on Skeletal Meshes User Description: In UE 4.14.0, the blueprint "Find Collision UV" functions doesn't work properly with Skeletal Meshes. While it works fine ...
ProjectWorldToScreen always returns True
UE - Gameplay - Blueprint - Apr 4, 2018ProjectWorldToScreen always returns true. User states: "This probably comes from that line of code : bResult = Player->PostProcessWorldToScreen(WorldPosition, ScreenPosition, bPlayerViewportRelati ...
BUG IN CLIENT OF LIBDISPATCH: crash on KeyPress down in WebBrowser
UE - Platform - Apple - Feb 12, 2020FCEFWebBrowserWindow::OnKeyDown() InternalCefBrowser->GetHost()->SendKeyEvent(KeyEvent); is processed on the UE4 GameThread, inside the Chromium Embedded Framework (CEF) it appears to call a syst ...
Interface cast nodes can be placed for non-object pins
UE - Gameplay - Blueprint - Feb 1, 2021Interface Cast nodes appear to be returned as valid and context sensitive for every possible pin, even ones like floats and integers. Following the repro above, it is easy to place a node but it wil ...
[AI] FInstancedStruct is not dupilicated properly if values are different from an Actor's defaults
UE - AI - Jan 24, 2024A licensee reports that the values of an FInstancedStruct do not get properly duplicated if they differ from the default values of the Actor or TArray to which they belong. Possible short-term wo ...
MoverExamples: characters have 1-frame unnecessary extra input latency
UE - Runtime - Character - Mar 6, 2024Due to the way input is handled on the MoverExamplesCharacter, including AnimatedMannyPawn, we have a delay in the time between when an input event occurs and when it is ingested by the movement sim ...
Linear Spline Point Type doesn't distributed over a linear value
Tools - Nov 3, 2015Linear Spline Point Type doesn't have expected result User Description: I was following a tutorial from Dokipen (Tutorial) about using spline to create linear arrays. Everything is working fine f ...
Alt-tabbing out of a Standalone App or packaged version of a game does not trigger LostFocus or ReceiveFocus
Tools - Sep 9, 2015If a user uses Alt-tab to change to another window, the ReceivedFocus and LostFocus functions are not called as they would usually be called when using something such as Shift+F1 or Ctrl+Esc. Note: ...
Wildcard Array in Macro Causes Error Message to Appear
UE - Gameplay - Blueprint - Nov 9, 2015Creating a Macro with a Wildcard Array and then using that macro to accept an array as input and attempting to get the first element causes an error to appear in the output log. In the AnswerHub u ...