Unreal Engine Issues

Editing parent emitters with mesh renderer in a niagara system causes crash

After editing the parent emitters of a Niagara system with mesh renderer particles the engine will crash the next time the editor and system are opened.  This was tested with both engine content cub ...

Linux - Crash when moving/turning the viewport camera in project that contains hair

I've attached the project log, crashreport, and crash info to this ticket. This issue only appears to be happening on Linux (On both Nvidia/AMD cards) and does not happen when the hair is disabled i ...

Crash when Deleting Variable from Blueprint Struct

The Editor will crash when attempting to delete a variable from a Blueprint struct. This crash does not seem to happen if save the map with the actor in it. ...

Crash when save the blueprint function variable that set the StringTable asset

This issue doesn't crash in 4.21. It is rewritten as GIsSavingPackage = true in UPackage::(Save() when Blueprint is saved, but it's rewritten as false in 4.21. Workaround Do not set the String Tab ...

Crash compiling a blueprint after changing a Text variable to String, while the Details panel are visible

Crash occurs when the user changes a Text variable to a String while the Details panel is displaying its properties, and then compiling. Crash does not seem to occur if the Details are not visible. ...

Crash hovering mouse over User Defined Struct array variable on Widget Blueprint breakpoint

Looks a crash caused by an access violation when trying to export text from the property for the tooltip. Seems to be limited to arrays of user defined structs and the Widget Blueprint editor. ...

Struct crashes when switching variable types while the default values are being shown

If the user switches between two variable types in a struct while the default values are being shown then the editor will crash ...

Crash when placing a native UserWidget in a panel within another UserWidget

The engine crashes when trying to initialize a native UserWidget within another widget. This happens because UUserWidget::GetSlotNames gets called before the widget tree is initialized, and we don't ...

Crash when resetting asset import data in static mesh editor

Unable to save Blueprint Function Library if it references a string table entry

Regression. Function library saving crashes if it references to a string table entry. ...