Error when clicking picture-in-picture button while casting

[TheModMaker]

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

What version of Shaka Player are you using?
v2.5.3 and master (v2.5.3-master-38-gfd326951)

Can you reproduce the issue with our latest release version?
Yes

Can you reproduce the issue with the latest code from master?
Yes

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

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

What browser and OS are you using?
Chrome for Mac and Chromecast Ultra

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

What are the manifest and license server URIs?
Any (tested with first Angel One asset on home screen).

What did you do?

1. Load asset.
2. Start casting.
3. Click picture-in-picture button

What did you expect to happen?
Either button to not be present since it's unavailable, or no error to be thrown.

What actually happened?
Error appears with this.video.requestPictureInPicture is not a function. Otherwise seems to ignore error and nothing happens.