I've found a way to "fix" this sync bug.

I checked Sync Internals > Sync Node Browser > Device Info to find out the version of Opera on my old PC. Then I downloaded the same version, which was 80.0.4170.16 (I stopped using Opera in 2021 and came back this week).

The bookmarks synced correctly in that version, so I think they need to be updated to work in a newer version. When I change a folder or a bookmark name, it syncs with the newer version, but changing the folder name only shows the folder and not its content.

I also noticed in the Sync Internals page that editing a folder or a bookmark in an older version of the browser would show as a new entry in the Type Info > Total Entries of the newer version.

I took some screenshots to show how to update an old bookmark:

Opera 98: Sync Internal before editing a bookmark in v80.

Opera 98: Sync Internal after editing a bookmark in v80.

Opera 98: Bookmark folder appears after adding a space in v80.

Opera 80: Same folder. Adding a space in the bookmark.

Opera 98: The same folder after.

I'm currently unable to see/edit/delete any "User Bookmarks" bookmarks as it seems that only "Bookmarks bar" is syncing.

This problem is happening to me on all systems that I've tried. Opera version: 98.0.4759.6

• Windows 10 22H2
• Manjaro 22.1.0 (Kernel 6.2.12)

Prints below for a better understanding of the problem:

Browser Bookmarks Page

Opera Sync Page

Browser Sync Config