ICU was built with timezones disabled for Android

UE - Platform - Mobile - Mar 23, 2017

ICU for Android was built with U_TIMEZONE defined to 0, which means that ICU always considers itself to be in UTC, rather than use its default Android implementation. We should try and build ICU ag ...

ICU was built with timezones disabled for Linux

UE - Platform - Linux - Mar 23, 2017

ICU for Linux was built with U_TIMEZONE defined to 0, which means that ICU always considers itself to be in UTC, rather than use its default Linux implementation. We should try and build ICU again ...

Crash when press F5 key any Test build project

UE - Graphics Features - Oct 14, 2020

When the F5 key is pressed during the lunch of the application created by Test configuration, the application will crash. This depends on the project. No Crash: Third Person project, ShooterGame ...

Merge Actors Tool Simplifies Nanite Meshes

UE - World Creation - Worldbuilding Tools - Merge Actor - May 19, 2023

Tried every combination of LOD Selection Type, Nanite enanbled/disabled, the only way it would seem to get the full number of triangles from the source mesh into the merged mesh is to disable Nanite ...

Crash at compile time when using a VariableSet node with a local variable created by pasting a private property

UE - Framework - Blueprint - Oct 7, 2025

When a property is created in this way, a local variable with a Private flag is generated. Since such a variable is generally not desirable, it would be better to remove the Private flag upon pastin ...

Static code functions cause associated blueprints to not compile after a hot reload

UE - Foundation - Cpp Tools - Hot Reload - Oct 14, 2016

If 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 ...

Rotating a static mesh makes it slightly smaller

UE - Gameplay - Jan 11, 2017

If a static mesh is rotated 180 degrees, it is made slightly smaller than it usually is. There are some other degrees that can give the same effect without the shrinking, such as 540. Regression?: ...

"Fill Data Table from CSV File" crashes packaged project.

Tools - Sep 18, 2018

Using "Fill Data Table from CSV File" node in packaged project crashes instantly.  User acknowledges that they are misusing this node and requests that limitations are documented. (Editor only Tool ...

Edited properties of replicated components created via the "AddComponent" BP node aren't correct on clients

UE - Networking - Oct 8, 2019

When properties are customized on an Add Component node, and the component is replicated, the client will create the component without the customized properties. This is likely due to subobject repl ...

Blueprint compiler doesn't always initialize struct consts correctly

UE - Framework - Blueprint Compiler - May 1, 2025

Blueprints currently don't support unsigned 64 bit ints, but they do support signed 64 bits. If a Blueprint uses a native struct variable that contains a uint64 property, it incorrectly assigns that ...