Unreal Engine Issues
Unreal Engine Issues
Physics Mover: AI movement and collisions can cause sharp increase in velocity
UE - Gameplay - Player Movement - Mover - Aug 19, 2025A pawn using the physics mover and using AI movement can sometimes gain an ton of velocity quickly upon colliding with another physics object. It seems to fix it self and revert back to it's origina ...
Crash compiling Widget Blueprints that contain Dynamic Entry Boxes with their Entry Widget Class set to each other
UE - Editor - UI Systems - Jun 10, 2020Currently the Dynamic Entry Box has no protection against recursion, leading to a stack overflow and a crash. This issue was reported and tested in 4.25 (CL-13144385). This was reproduced in 4.24.3 ...
Crash on stopping PIE after using DemoRec in PIE
UE - Networking - Jan 20, 2016Crash on stopping PIE after using DemoRec in PIE. Possibly related to [Link Removed] which must be fixed, but happens upon stopping PIE. Reproduced in 4.11.0 Preview 3 binary and Main (//UE4/Dev-Ma ...
Calling functions that have an implicit WorldContextObject parameter in a Blueprint function library will give a compile error about a missing __WorldContext pin
UE - Gameplay - Blueprint - May 21, 2015Calling functions that have an implicit WorldContextObject parameter (line trace, execute console command, etc) in a Blueprint function library will give a compile error about a missing __WorldConte ...
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 ...
DataAssets with a field called "Name" can cause multiple Name columns to appear in the content browser
UE - Editor - Content Pipeline - Content Browser - Jul 18, 2017A DataAsset with a FText property called "Name" will confuse the content browser, causing it to create a new column each time the folder containing the DataAsset is entered. This appears to be a cor ...
Prompt for camera permissions when running Google VR plugin
UE - Platform - XR - Mar 7, 2018Need to update these UDN threads when the issue is fixed. https://udn.unrealengine.com/questions/401360/ios-shipping-build-crash.html https://udn.unrealengine.com/questions/428225/about-ios-ship-b ...
Tiled Landscape LOD doesn't work with World Origin Rebasing
UE - LD & Modeling - Terrain - Landscape - Apr 26, 2018Using the Landscape LOD system with World Origin Rebasing causes the LODs on the landscape to mess up. This only appears with imported tiled landscape where the main actor is in the persistent level ...
4.20p1 Niagara System & Emitter windows missing compile icon with small toolbar icons
UE - Niagara - Jun 7, 2018in the Niagara System & Emitter windows the compile button will be missing if small toolbar icons is enabled. The icons work correctly if this is not enabled. Found in 4.19 CL# 4033788, 4.20p1 CL# ...
[Landscape] only returns DefaultPhysicalMaterial when run in editor world
UE - LD & Modeling - Terrain - Landscape - Jun 19, 2018Landscape will only return "DefaultPhysicalMaterial" when run in editor world. In game time it will return the proper physical material. Found in 4.19 CL# 4033788, 4.20 Preview 3 CL# 4135216 , 4.21 ...