Here is an example from one of my released extensions
And at time of writing it’s working. (on iOS)
It could however be that the Twitch CSP is working fine, but the CSP/other restrictions on your website itself is blocking. The error message didn’t declare which/whose CSP was at fault just that there was one.
If you can get developer tools going you might be able to trace it. But the same CSP will apply to Desktop and Mobile, so you can test on Desktop at well if needed.
Android might be hanging onto who knows what in terms of caching