Brave not remembering or storing cookie details for my self hosted UniFi portal on Windows 11, latest version of Brave.

As per title, for some reason only this site does stay logged in when I close/open Brave.

Using latest version of Brave, and have even disabled Shield for this site to no avail.

Any tips would greatly be apprecaited.

All other sites work as expected, i.e: Close Brave and still logged in upon restart/re-open.