Level Actors that are converted to a Blueprint using "Convert Selection to Blueprint Class" and using "Harvest Components" as the CreatingMethod, does not sanitize dots (.) character and make them invalid for operations like StaticFindObject.

UE - Framework - Blueprint Editor - Feb 20, 2025

When Level Actors are converted into a Blueprint using the "Convert Selection to Blueprint Class" option with "Harvest Components" as the creation method, the conversion process does not sanitize do ...

Anim State Notifies Don't Consistently Fire Begin/End Events for Looping Anim Sequences

UE - Anim - Runtime - Anim Blueprints - Jun 9, 2025

If you have an Animation Notify State and set it up on an animation to start at the exact beginning of the anim sequence and finish exactly at the end (I have attached a picture of this). It doesn't ...

Critical Errors when replacing references of blueprints

Tools - Mar 26, 2015

If an instance of a blueprint is in the scene selecting it and another blueprint and choosing the option to Replace references of the one in scene with the other will cause Critical Failure errors. ...

Re-importing animations from .fbx created in blender stops animation from correctly animating

OLD - Anim - Feb 4, 2016

Re-importing animations from .fbx created in blender stops animation from correctly animating. ...

Custom functions can call Set Timer nodes

UE - Gameplay - Blueprint - Nov 11, 2015

Custom functions can call Set Timer nodes. There are no other time related functions that can be called through custom functions. Calling a timer through custom functions seems to lead to editor cra ...

Render Target as Material Image in UMG is Clipped when setting Fullscreen in Standalone (Alt+Enter)

UE - Editor - UI Systems - Jun 1, 2015

Render Target Material is clipped as an Image within UMG when attempting to set to fullscreen while playing in Standalone mode. The interesting thing I noticed about this bug is that the issue is n ...

FDateTime is not correctly formatted by As Date Time when using any dates before January 1st, 1970

UE - Editor - UI Systems - Localization - Mar 30, 2015

FDateTime is not correctly formatted by As Date Time when using any dates before January 1st, 1970. From a conversation on Slack with MaxP: this is probably an underflow the ICU based string format ...

Live: Copy & Pasting ForEachLoops will cause them to retain information from the original

UE - Gameplay - Blueprint - Nov 3, 2014

If the user copies and then pastes a For Each Loop the loop will retain previous data such as the array type and will cause compiling errors. ...

Get Blackboard Value with null input causes crash

UE - Gameplay - Blueprint - Jan 6, 2015

Getting a blackboard value as actor and setting an actor to that on tick causes crash. The real issue here is that you can use a function in BP (in this case `UBTFunctionLibrary::GetBlackboardValue ...