Desktop: Removing ToggleTabMovesFocus shortcut crashes app

[Meisenburger13]

Operating system

Windows

Joplin version

3.3.9

Desktop version info

Joplin 3.3.9 (prod, win32)

Device: win32, x64
Client ID: 6cd667061e4a450dadcb5e41273a4348
Sync Version: 3
Profile Version: 47
Keychain Supported: Yes
Alternative instance ID: -

Revision: 5d0fa75

Automatic Backlinks to note: 3.0.3
Backup: 1.4.3
Button Counter: 1.0.0
Code-Clipboard: 1.0.0
Embed Search: 2.0.0
Embedded notes: 1.0.0
Extra Markdown editor settings: 1.11.0
Freehand Drawing: 3.0.1
Frontmatter Overview: 1.1.0
Inline tags: 1.3.0
Journal: 2.0.0
Math Mode: 0.7.1
Note Rename: 1.0.0
Note Tabs: 1.4.0
Persistent Editor Layout: 2.2.0
Q&A: 1.0.0
Quick HTML tags: 0.2.0
Quick Links: 1.3.1
Quick Move: 1.1.0
Recipe Scaler: 0.9.2
Reset Checkboxes: 1.0.3
Rich Markdown: 0.16.0
Table Formatter Plugin: 1.2.1
Templates: 2.4.0

Current behaviour

1. Open settings → keyboard shortcuts.
2. Remove the shortcut for Toggle editor tab key navigation (internally called toggleTabMovesFocus).
3. Go back to the main app.
4. Joplin crashes (crash log is attached below).

I've tested this in safe mode as well, so it shouldn't be one of my many plugins causing this issue.
To get Joplin working again, I copied the default shortcuts back into keymap-desktop.json and restarted the application.

Expected behaviour

Joplin shouldn't crash after editing a shortcut.
If it's necessary for the shortcut to be assigned to a value, Joplin should not let the user leave it empty.

Logs

crash-log.txt