Video starts playing automatically when selecting a playback rate through the UI

[absidue]

Have you read the FAQ and checked for duplicate open issues?

Yes

If the problem is related to FairPlay, have you read the tutorial?

Not applicable

What version of Shaka Player are you using?

4.12.4

Can you reproduce the issue with our latest release version?

Yes

Can you reproduce the issue with the latest code from main?

Yes, in the nightly demo

Are you using the demo app or your own custom app?

Both

If custom app, can you reproduce the issue using our demo app?

Yes

What browser and OS are you using?

Firefox, Windows 10

For embedded devices (smart TVs, etc.), what model and firmware version are you using?

Not applicable

What are the manifest and license server URIs?

Any this is a UI bug

What configuration are you using? What is the output of player.getNonDefaultConfiguration()?

Default

What did you do?

1. Load any asset on the nightly demo page
2. Pause the video
3. Select a playback rate from the playback rate menu

What did you expect to happen?

The video to stay paused like it did in 4.11.x and earlier versions.

What actually happened?

The video started playing as soon as I selected a playback rate.

Are you planning send a PR to fix it?

No, as I'm not sure what the best solution is other than reverting the PR that is causing all of these issues: #7580

Similar bug report: #7724, #7757