Hey SteveNeato, it's to do with multi threading works in HTML.
Brave is one of the browsers that interacts poorly with a lot of features sadly. It should work fine with Chrome and Firefox. I'll do some testing at a later date.
It may be something you can change on your end in the meantime? It may need hardware acceleration enabled or a setting in your browser to enable. In chrome the setting is called "SharedThreadBuffer".
Thanks for trying anyway!
EDIT: I did some further testing specifically with a brave browser and couldn't replicate the issue, even when trying to break it by reducing permissions and blocking functionality intentionally like disabling javascript.
Some generic fixes that may or may not work:
-Update browser to latest.
-Allow v8
-Tick "use graphics acceleration when available"
-Allow javascript to run (sharedarraybuffer uses a javascript api)