Whatever issues Brave has had in the past with loading Disqus (for me) – this is not one, with the latest release:
OS Release 4.15.0-1-amd64
Update Channel Release
OS Architecture x64
OS Platform Linux
Brave Sync v1.4.2
Shields up or down (sandboxing remains off) – Disqus now will not give me a login: even tho’ the (annoying) pop-up window itself worx just fine… It’s blank inside the tab.
What does work however, is going to the Disqus website itself – and logging onto Disqus comments there. THEN it appears everything is good-to-go with Brave and Disqus comments.