How to leave sync chain


Description of the issue:

“Leave Sync chain” button does clear the sync chain.
.
How can this issue be reproduced?

  1. Choose Settings/Sync
  2. At bottom of page, click "Leave Sync chain
  3. On the warning dialog, confirm the action with the OK button
  4. Restart brave
  5. Sync chain has not changed. Sill under ‘sync manage devices’ the same device list as before.

Expected result:
Empty sync chain so that I can join a new chain

Brave Version( check About Brave):
[
Version 1.18.78 Chromium: 87.0.4280.141 (Official Build) (64-bit)

Additional Information: