Brave uses a fake account derived from a cryptographic key pair, which has no real refresh token in IdentityManager. With this flag enabled by default, AccountManagedStatusFinder fails to resolve the managed status for Brave's account, breaking sync. Chromium change: https://chromium.googlesource.com/chromium/src/+/d7daa20df8d712ac7f09f4a54d722e02d0288d85 commit d7daa20df8d712ac7f09f4a54d722e02d0288d85 Author: Marc Treib <treib@chromium.org> Date: Thu Feb 12 07:53:14 2026 -0800 Enable SyncDetermineAccountManagedStatus by default Bug: 40897778 Change-Id: I96b39a5ea0d1a15c2922ae450c218e9b6a6a6964 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7567311 Reviewed-by: Jood Hajeer <jood@google.com> Commit-Queue: Marc Treib <treib@chromium.org> Cr-Commit-Position: refs/heads/main@{#1583984}