# Widget Blueprint function rename crashes editor with OldName/NewName != NAME\_None assertion

**URL:** <https://forums.unrealengine.com/t/widget-blueprint-function-rename-crashes-editor-with-oldname-newname-name-none-assertion/2769758>\
**Category:** Issues and Bug Reporting (Unreal Engine)\
**Tags:** unreal-engine, open, Widget, Blueprint\
**Created:** [September 14, 2026, 5:31pm UTC](https://forums.unrealengine.com/t/widget-blueprint-function-rename-crashes-editor-with-oldname-newname-name-none-assertion/2769758 "2026-09-14T17:31:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Chordily](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Chordily](https://forums.unrealengine.com/u/Chordily)\
**Post date:** [September 14, 2026, 5:31pm UTC](https://forums.unrealengine.com/t/widget-blueprint-function-rename-crashes-editor-with-oldname-newname-name-none-assertion/2769758/1 "2026-09-14T17:31:18Z")

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### Summary

While working in a Widget Blueprint, I encountered a reproducible crash related to Blueprint function naming. I created a function named `AddConversationEntry`. The function name initially displayed correctly, but after adding a function input named `DisplayName` as a `Text`, the function name became blank both on the entry node and in the Functions list in the My Blueprint panel. Hovering over the function still showed the correct name. Attempting to rename the function from either the entry node or the My Blueprint panel consistently causes Unreal Editor to crash.

I was able to reproduce the issue in a newly created Widget Blueprint. I also found that changing the input name from `DisplayName` to `CustomerDisplayName` causes the function name to display normally again, which suggests the issue is specifically triggered by the `DisplayName` input name.

The issue still persists after doing the following:

- Duplicating the blueprint
- Creating a brand new widget blueprint and redoing it
- Deleting the project’s `Saved` and `Intermediate` folders
- Verifying the installation in the Epic Games Launcher

### What Type of Bug are you experiencing?

UI / Tools

### Steps to Reproduce

- Open a Widget Blueprint
- Create or open a function
- Add a `Text` input named `DisplayName`
- The function entry node displays with a blank title even though hovering it still shows the function name
- Rename the function from either the function entry node or from the My Blueprint Panel
- Unreal Editor crashes

### Expected Result

The function should display its correct name and should be able to be renamed without crashing the editor.

### Observed Result

After adding a `Text` input named `DisplayName`, the function title becomes blank on both the function entry node and in the My Blueprint panel, although hovering still shows the correct function name. Attempting to rename the function causes the editor to crash.

### Affects Versions

5.8

### Platform(s)

Windows

### Video

> **[2026-09-13 15-04-47.mp4](https://drive.google.com/file/d/10Wbbj_HEur62zNsa8WBDXWv1AHHvf-wL/view?usp=sharing)**
>
> Google Drive file.

### For crash reports, include your callstack

Assertion failed: (OldName != NAME\_None) && (NewName != NAME\_None) [File:D:\build++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp] [Line: 5915]

UnrealEditor\_Core  
UnrealEditor\_UnrealEd  
UnrealEditor\_UnrealEd  
UnrealEditor\_Kismet  
UnrealEditor\_Kismet  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_Slate  
UnrealEditor\_ApplicationCore  
UnrealEditor\_ApplicationCore  
UnrealEditor\_ApplicationCore  
UnrealEditor\_ApplicationCore  
user32  
user32  
UnrealEditor\_ApplicationCore  
UnrealEditor  
UnrealEditor  
UnrealEditor  
UnrealEditor  
UnrealEditor  
UnrealEditor  
kernel32  
ntdll

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**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\
**Post date:** [October 8, 2026, 10:00pm UTC](https://forums.unrealengine.com/t/widget-blueprint-function-rename-crashes-editor-with-oldname-newname-name-none-assertion/2769758/4 "2026-10-08T22:00:20Z")

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UE-398924 has been added to our ‘To Do’ list. Someone’s been assigned this task.