Description

If the delete key or keyboard shortcut is used to delete the first item in an InnerBlocks list an exception is thrown. Using the 'Remove block' menu option for the block works as expected. Using the delete key for any block other than the first one also works as expected.

This issue can be replicated with the Navigation block, and also on the gallery block refactor PR

Step-by-step reproduction instructions:

1. Add a Navigation block and add several child navigation items to it.
2. Select the first item in the navigation and hit delete key to remove
3. Block shows unable to preview message and exception in console

Code snippet

Exception is thrown at https://github.com/WordPress/gutenberg/blob/trunk/packages/block-editor/src/components/block-list/use-block-props/index.js#L86

For some reason the useBlockProps hook for the block that has been deleted gets stuck in a loop and throws an exception when trying to get the title of the block that is now deleted.