Try doing a search on the main forum page, e.g. from here
https://forums.developer.apple.com/community/beta/macos-1015-beta
search for "legacyScreenSaver"
Result: works.
Now try the search from here:
https://forums.developer.apple.com/community/beta/macos-1015-beta/content
Result: nothing is found.
This is broken, right?
I thought my post had been deleted at first.