Blocklist values for comments are not persisted

[ceyhun]

Steps to reproduce the behavior

1. Go to Site Settings > Discussion > Blocklist
2. Add a new word
3. Go back to Site Settings
4. Go into Discussion > Blocklist again

Expected behavior

See the newly added word in the list

Actual behavior

The new word doesn't appear

New word also doesn't appear on web:

1. Go to your site's Settings from the admin panel
2. Switch to Discussions tab
3. Check under Disallowed comments

Same both on Jetpack and WP.com sites

Tested on iPhone 11 Pro, iOS 14, WPiOS 16.8

[dangermattic]

Thanks for reporting! 👍