[Bug] Play Next by default automatically resetting when clicking any other video

[iudicium]

Describe the bug
When selecting play by default, if you wait until the video ends, it will automatically play the next video. However, if you click on any other video while it hasnt ended, it will reset the play by default button.

Steps to Reproduce

1. Go to any yewtu.be video. Select play next by default.
2. Click on any other video and see that the button has automatically renewed and not playing anything by default anymore.
3. Select Play Next by default again and play the video until the end. ( You can just scroll until the end to make the process faster)
4. See that the Play Next By Default button has been saved once you waited for the video to end.

Screenshots

this is the button you're looking for.

Additional context
I am wondering if this is a feature of invidious or is this a bug?
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[SamantazFox]

This is expected. The checkbox on the watch page doesn't update the preferences cookie.

Related: #3105 / #3129