Unreal Engine Issues
Unreal Engine Issues
When CommonTabListWidgetBase and ScrollBox are arranged vertically, tabs within CommonTabListWidgetBase momentarily become selected when scrolling the ScrollBox upward
UE - AI Workflows - UI Systems - Mar 19, 2026When attempting to scroll the ScrollBox upward, the cursor briefly shifts focus to another widget (CommonTabListWidgetBase). When logging this behavior using LogSlate VeryVerbose, it can be observed ...
Duplicating Asset With Suffix 0 Will Jump To A Suffix Of 2
Tools - Oct 28, 2016When duplicating an asset with the suffix 0 in the content browser the duped asset will get a suffix of 2. Any other number works fine for example if you dupe an asset named "Test_23" the duped mesh ...
Launching game on Oculus Rift through SteamVR reverses hands
UE - Platform - XR - Sep 13, 2017When launching the VR Template for example on Oculus Rift but through SteamVR using -hmd=steamvr and disconnecting htc Vive, the player's hands are reversed. Important for titles that want to sell ...
Content ordering for assets with full numeric names.
UE - Editor - Content Pipeline - Content Browser - Feb 5, 2016Content files that are labeled with both text and numeric values sort correctly, but files containing only numbers, don't share this behavior and end up with weird sorting order. MyMat_20, MyMat_20 ...
Can't Play In Editor after editing color value in color picker
UE - Anim - Runtime - Oct 23, 2020Can not launch PIE after set the value in color picker window to enter a number from the keyboard. Choose the color value with the picker or close the window with the Cancel button to return to it. ...
Details Panel - USTRUCTS do not save their expansions properly
UE - Editor - Verse Class Editor - Oct 6, 2023Currently USTRUCTS do not support saving expansions properly. While we won't implement a separate pathway for USTRUCTS to save their expansions, a general solution to save expansions for class or st ...
Cloth Asset - Cloth bounces off wildly during the rendering of a sequence in MRQ.
UE - Runtime - Simulation - Jun 26, 2024The motion blur rendering is causing some issues when rendering the cloth asset as the timestep wildly changes without the number of substeps being increased, The movie pipeline code needs to man ...
Editor crash after reverting a Blueprint asset in source control
UE - Framework - Blueprint Compiler - Feb 26, 2025Added context from dev support ticket:The crash occurs because FDelegateProperty::Serialize accesses a dangling SignatureFunction pointer. Given that its derefencing dangling pointers the specifi ...
Custom fallback mesh LODs for Nanite-enabled meshes not working
UE - Rendering - Features - Sep 15, 2025Creating a custom fallback mesh with LOD for Nanite-enabled meshes with multiple materials, results in mesh LODs with errors. As the number of material sections (material slots) decreases with coars ...
Can't PIE or Save: Editor gets into odd state when editing parameters.
Tools - Jul 20, 2016I've seen this happen in other areas of the editor as well: Data Table fields (floats) for example. Manually typing in numbers to fields seems less prone to this error; using spinners to drag value ...