Brave not syncing between iPhone and desktop PC

Description of the issue: The bookmarks between Brave on Windows 10 and Brave on iOS 14.5 (BETA) are not syncing automatically. I have to delete and make a new Sync Chain and even then the bookmarks that have been deleted are still present and some are disorganized.

Brave Version: 1.21.77

Type of devices currently running on the Sync chain in question: Mobile and desktop PC