Unreal Engine Issues
Unreal Engine Issues
[CrashReport] Commandlet crash - UE4Editor_Engine!FAnimationUtils::CompressAnimSequenceExplicit() [animationutils.cpp:621]
OLD - Anim - Sep 7, 2017This is an infrequent commandlet crash that has affected a number of users exclusively in 4.17.1 (possible regression from 4.17.0?). There are also two instances of older cases in 4.13 and 4.15, bu ...
Mutable: Child parameters hidden when intermediate Object Group uses "All Options"
UE - Anim - Mutable - Mar 31, 2026FCustomizableInstanceDetails::FillChildrenMap() unconditionally registers parent-child relationships via __ParentParamName metadata without verifying the parent exists in the active parameter list. ...
Material Stats returning Incorrect Sampler and Instruction Counts
UE - Graphics Features - Mar 9, 2017When creating and modifying a material, the base Texture Sampler count and instructions are returning incorrect values. In 4.14.3 whenever you create a new material the Texture Sampler count is 0/1 ...
GameplayTagQuery AutoDescription not refreshed after GameplayTag redirect on load
UE - Gameplay - Gameplay Tags - Jan 21, 2026FGameplayTagQuery does not refresh its cached AutoDescription after GameplayTag redirects are applied during asset load. As a result, after renaming a GameplayTag and restarting the editor, the Game ...
Adding assets to a project on a drive that is full still creates the file at the desired location instead of in a temporary location and provides no information as to why the asset is failing to load, corrupting the asset
Tools - Oct 31, 2016Adding assets to a project on a drive that is full still creates the file at the desired location instead of in a temporary location and provides no information as to why the asset is failing to loa ...
Editor Crashes When Attempting to Change Units in Project Settings
Tools - Aug 17, 2016The editor crashes when attempting to make a change to the units located in Edit->Project Settings->Editor->Appearance. The crash occurs as soon as one of the dropdowns is clicked. This is a regr ...
[CrashReport] UE4Editor_UnrealEd!UTransBuffer::Cancel() [editortransaction.cpp:697]
Tools - Nov 17, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Error message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 833] ...
Electra video playback fails if project or package is under multibyte characters path
UE - Media Framework - Sep 16, 2022The URL parser encodes the input path to a URL-encoded path even if it is local, so if the path contains unicode characters (such as Japanese Kanji ), the media file cannot be read. Following worka ...
Nativized widget with String table data crashes packaged game
UE - Gameplay - Blueprint - Jun 1, 2017There is a crash that is occurring for packaged games that use the string tables and nativized blueprints. This issue only affects a packaged build of the game. Testing for this issue did not yield ...
Replication issues & warnings if a client hitches while the server seamless travels
UE - Networking - Jul 28, 2020If a client hitches while a server performs a seamless travel, the client will get multiple lines of logspam of these warnings:Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/ ...