It works everywhere but on Brave Brave Version( check About Brave):
[Version 1.17.75 Chromium: 87.0.4280.88 (Official Build) (x86_64)] Additional Information:
I turned off all extensions too (I only use 5 reputable ones) and that wasn’t the issue either.
Can you go to Menu --> Settings --> Extensions and check and see if the Automatically redirect .onion sites option is enabled? If so, please disable it and your problem should be resolved.
When that option is enabled, it basically clicks that button (the one in the image I shared) for you. The browser essentially checks to see if a site has a .onion site available. If so, the browser will launch the site in a tor window (since tor can traverse the .onion network of sites).
You should no longer encounter this issue with that option disabled.