Asked to sign in but I already am

The meeting I am trying to join is through my institution so I have to be signed in. When I'm on my computer this is no problem. The problem is on mobile. I open the zoom app, click sign in sso, a browser pops up, I sign in to the browser, I put the zoom room id in now I'm signed into the browser, and oh, I'm redirect to the app which prompts me to sign in. But I am signed in. I'm signed in on the browser not the app. But the app forces me to sign in on the browser. So how exactly am I supposed to join?