Can't remove old sync chain

I seem to be having issues with Windows 10 sync. Clicking remove from sync chain doesn’t do anything. Is there perhaps a local cache I could clear to fix this?

Spec Details Below:
Unsure how to reproduce.
Win 10 x64 Pro
Latest Nightly Brave [Version 1.21.35 Chromium: 88.0.4324.96 (Official Build) nightly (64-bit)]