[wp-trac] [WordPress Trac] #64824: User is completely unable to edit content when `wp_enable_real_time_collaboration` is missing from `wp_options`

[WordPress Trac]

#64824: User is completely unable to edit content when
`wp_enable_real_time_collaboration` is missing from `wp_options`
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 Reporter:  desrosj       |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  7.0
Component:  Editor        |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by dlh):

 I also encountered this issue today. But I think there's an issue in
 [61833] that contributes to the problem.

 [61833] added a filter to
 `default_option_wp_enable_real_time_collaboration` to enable RTC by
 default. This happens in `default-filters.php`.

 However, on `rest_api_init`, the `wp_enable_real_time_collaboration`
 setting is registered as part of `register_initial_settings()`. The
 registration arguments include a default of `false`, which adds another
 filter to `default_option_wp_enable_real_time_collaboration`. Because this
 filter is added later, it runs later and overwrites the filter from
 `default-filters.php`.

 In my multisite installation running beta3, this was the cause of my
 seeing the immediate "Connection lost" message. If I change the priority
 of the `__return_true` filter to be greater than `10`, it works as
 intended, and I don't see the message.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64824#comment:2>
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