I've had issues in the past with following links within threads has opened up in the app which I don't have on my phone.
So if I want to read something I click "watch" in the app, close down that page, and then I can read it on my usual Web page.
But today when I've clicked on the doghouse topic, it's not showing the usual list of thread titles, but is similar to the app, just not purple, but when I click on a thread it takes me to the app.
I don't use the app because I struggle to read text on a dark background, plus I can't highlight the OP's posts.
No other topics are doing this for me.
I've attached two screenshots showing the difference.