Unreal Engine Issues
Unreal Engine Issues
scroll box inside retainer box does not respect scroll box clipping
UE - Editor - UI Systems - Feb 14, 2018There is an issue where scroll boxes inside retainer boxes do not respect scroll box clipping. This issue appears to be a regression. Versions tested: Issue does not occur in 4.17 4.17.2 CL - 36589 ...
Reflections Not Behaving As Expected in Splitscreen
UE - Graphics Features - May 15, 2018In splitscreen, Player 0 view influences reflections for other player views. A user submitted the included test project showing the issue, and I have reproduced on 4.18.3 as well as 4.19.2 (see Spli ...
Child Actor components on Clients use the incorrect default values for variables that are not being replicated
UE - Gameplay - Blueprint - Aug 28, 2018When a Child Actor's class is replicated but the individual variables are not, the individual variables will use the default of the original BP class instead of the defaults that were set in the Chi ...
Missing Service Node warning when opening project
UE - AI - Sep 24, 2018Services in the Behavior Tree sometimes don't work when the project is first loaded. The Behavior Tree will print a "missing service node" warning and the BT will remain inactive. This was reported ...
EarlyZPassOnlyMateriaMasking Makes Masked Materials on Particles Flicker When Close to the Camera
UE - Niagara - Oct 12, 2018When "r.EarlyZPassOnlyMaskedMaterials" is enabled, masked materials used with particles will flicker when close to the camera. Found in 4.17 CL# 3658906, 4.18 CL# 3832480, 4.19 CL 4033788, 4.20 CL# ...
Confusing build error message provided when semi-colon is not added after a forward declaration in an Interface header file
UE - Foundation - Cpp Tools - UnrealHeaderTool - Feb 15, 2019If a forward declaration of a class is made in the header file for an Interface class, and no semi-colon is included at the end of the forward declaration line, the build will fail with a confusing ...
GetTeamAttitudeTowards is called before AI Controller can spawn and gets a null value
UE - AI - May 6, 2019Licensee is experiencing an issue where GetTeamAttitude is being called before the AI Controller's Construction event. This results in the warning "GetTeamAttitudeTowards - Pawn is null!" being outp ...
Nvidia Graphics Drivers cause editor menus to flicker and disappear after using the editor for an extended period of time
UE - Graphics Features - Apr 16, 2021This issue seems to be occurring on a variety of Nvidia cards. So far, I haven't seen any indication that it is affecting AMD graphics cards. The majority of the reports have indicating that the pro ...
Editor 'Build All Levels' discards Volumetrics Lightmaps in persistent level
UE - Graphics Features - May 14, 2025Building the level or lightmaps can clear the volumetric lightmap. In 5.5, this requires you to perform a full build, or a lighting only build with a BSP brush in the scene. In 5.6, all level build ...
Static code functions cause associated blueprints to not compile after a hot reload
UE - Foundation - Cpp Tools - Hot Reload - Oct 14, 2016If a function inside a BlueprintFunctionLibrary class is declared as static, instances of the function node inside blueprints cause the blueprint to not save after a hot reload. This does not affec ...