I don't believe I've ever said anything about that being addressed. I have said that the club option in the app is an embedded mobile browser. It does not expose the ability to type in addresses.
If there is a way to get to an arbitrary website, which I don't see short of posting your own link in a content areas and clicking on it, then that's not something I believe the site can prevent as the embedded browser is not part of the app code.
That said, I'm not an Android developer so don't know how much control there is on external linking.
About 5 months ago, I made a forum post about an issue with the clubs button in the android app. If you didn't know, you can just navigate away from the page in app to say a p orn site or the dark web or something, while still being in the app. On paper this means it looks like you spent 2 hours on chess, when you were actually hiding a p orn problem from someone or something else along those lines. I was told by both support and martin (the moderator) that the problem would be addressed as soon as possible. Instead, we got a table slam, bots nobody wanted or needed, a change to puzzles, and more that I probably forgot. What gives, is pressing f more important than someone's mental health, or do you ignore this so you can keep customers?