Removing empty List block with delete key fails, leads to iOS crash

[dcalhoun]

Description

When attempting to remove an empty List block by pressing the keyboard delete key, the block is not removed on Android and the app crashes on iOS.

Step-by-step reproduction instructions

1. Add a List block to the content.
2. Pressing the Delete key.

Expected behaviour

The List block is removed and replaced with a Paragraph block.

Actual behaviour

Android: The List block is not removed nor replaced.
iOS: The app crashes.

Screenshots or screen recording (optional)

Android Screencast

Screen_Recording_20221014-145708_WordPress.Pre-Alpha.mp4

iOS Screencast

RPReplay_Final1665777602.MP4

WordPress information

• WordPress version: 6.1
• Gutenberg version: 14.3.0
• Are all plugins except Gutenberg deactivated? Yes
• Are you using a default theme (e.g. Twenty Twenty-One)? Geologist

Device information

• Device: Samsung Galaxy S20, iPhone SE
• Operating system: Android 12, iOS 16.1
• WordPress app version: 1.84.0 or soon-to-be 20.10 beta

[fluiddot]

I tested on version 20.9 and the issue can't be reproduced, so definitely this is a regression on version 21.0.

[dcalhoun]

This regression appears to have originated from #43181. I am researching further.