Slash command doesn't clear when / is deleted

[Robertght]

Steps to reproduce the behavior

1. Create a new post
2. Type the / block inserter shortcut
3. Remove the /

What I expected to happen

The / window to be hidden

What actually happened

The / window persisted until I pressed delete a second time and can jump around if you click away and back into a block area. This can lead to overlap on narrower content areas.

Context

Empathy testing

Browser / OS version

Chrome 91.0.4472.114 OS X

Is this specific to the applied theme? Which one?

No

Is there any console output or error text?

No

Screenshot / Video: If applicable, add screenshots to help explain your problem.

Original report in Automattic/wp-calypso#54330

[Mamaduka]

Probably related to #32986.

[talldan]

I've noticed this too!

[Mamaduka]

I did some testing, and if I change undefined to 0 for the hasSelection check`, the issue gets fixed.

gutenberg/packages/components/src/autocomplete/index.js

Line 380 in 1eaad3c

const hasSelection = record.start !== undefined;

Unfortunately, I'm not very familiar with the RichText component, so I don't want to introduce any regressions.