Unreal Engine Issues
Unreal Engine Issues
Switching to different modes in the Modes panel causes PIE to take input from a connected VR headset for the Y axis camera movement
UE - Platform - XR - Dec 9, 2016If a VR headset is connected, it will be used for Y axis camera input in PIE if you have switched to and from the Landscape tab in the Modes panel. You can fix this temporarily by reopening the edit ...
Crash in FUniformExpressionSet::FillUniformBuffer trying access deleted UTextureCollection
UE - Rendering Architecture - May 30, 2025Crash in FUniformExpressionSet::FillUniformBuffer trying access deleted UTextureCollection (Experimental in 5.6). The licensee describes their crash, their analysis, and a proposed fix: This crash ...
Getting a TextBlock variable from the Return Value of a Create Widget node inside a Player Controller will cancel all the nodes before it in Standalone
UE - Gameplay - Blueprint - May 15, 2015Getting a TextBlock variable from the Return Value of a Create Widget node inside a Player Controller will cancel all the nodes before it in Standalone. Does not occur in other PIE modes, and does n ...
[CrashReport] Tutorial crash UObject::execLetValueOnPersistentFrame()
UE - Gameplay - Blueprint - Jul 7, 2017This is another Tutorial crash that shares a similar callstack with [Link Removed] and [Link Removed], but those specific repro steps have been fixed while this one is still occurring in 4.16.2. On ...
Huge performance hit when recording a demo (demorec)
UE - Networking - Jun 3, 2019The current engine version (4.22) seems to suffer a huge performance hit when using the demo recording (demorec) feature. This issue is present in both the editor and the packaged game (developer bu ...
Pressed event triggered after calling FlushPressedKeys while holding the button
UE - Gameplay - Input - Oct 2, 2024This is an issue related to the behavior of the FlushPressedKeys function when called manually while a button is held. Once the function is called in C++, a Pressed event gets triggered even though ...
Reimporting a static mesh will cause some values to be reset back to defaults
Tools - Jul 5, 2017Reimporting a static mesh will cause some Static Mesh Editor values to be reset back to defaults. This was reported as JIRA UE-22205 back in 4.10 and was marked fix in 4.12. However, I wasn't able ...
Contact Shadow artifacts with ray lengths despite length
UE - Graphics Features - Nov 17, 2016Contact Shadows have more shadowing errors with lower to mid values than in 4.13 release when the feature was still considered experimental. Even low Contact Shadow Length value is causing issues. ...
Editor Crash with corrupted asset when opening within level or via the content browser.
Tools - Jan 5, 2017Editor will crash when a skeletal mesh has been added to a level and then reopening the project later if you try and access this level. If you attempt to open the skel meshes in the content browser ...
Map load stalls in texture streaming code
UE - Graphics Features - Jun 13, 2017A change was made to AActor.GetComponents which appends the results instead of resetting the output array. This seems to only impact 2 places in the code, and has a big side effect in the texture st ...