An error is thrown when using the entity quick bar

[mr-derk]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.

Describe the issue you are experiencing

An error is raised then closing the entity details popup.

The following error is displayed in the logbook:

frontend_latest/a4f644cd.js:172:251 Uncaught TypeError: Cannot read properties of undefined (reading 'item')

Describe the behavior you expected

no error was raised

Steps to reproduce the issue

1. Open the entity quick bar
2. Click on a random entity
3. Close the entity details popup (either esc or close button)
4. Check the logbook

What version of Home Assistant Core has the issue?

2021.9.2

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue with?

Google chrome 93.0.4577.63

Which operating system are you using to run this browser?

macOs Big Sur (11.4)

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

Uncaught TypeError: Cannot read properties of undefined (reading 'item')
    at HTMLElement.value (a4f644cd.js:2160)
    at j.handleEvent (app.f08a72d3.js:5264)
    at Object.notifySelected (02f7d316.js:1359)
    at G.setSingleSelectionAtIndex_ (02f7d316.js:238)
    at G.setSelectedIndex (02f7d316.js:238)
    at HTMLElement.select (02f7d316.js:1359)
    at HTMLElement.updateItems (02f7d316.js:238)
    at HTMLElement.layout (02f7d316.js:1359)
    at 02f7d316.js:238

Additional information

No response