User sees different report from app in teams

Thanks for the suggestion! I only have one audience set up for the entire app. The teams team in which the 4th report is shared has been granted access to all reports. And all reports are visible (as in none have been hidden from view). In the workspace that team has direct access.

I'll create a separate audience now for that 4th report specifically for that teams team (hiding reports 1-3 for them), share the 4th report again in the teams team in a new tab and ask the user if they can now see the 4th report in teams. 

Even though I still don't understand why it did not work as I had it set up initially, let's hope this resolves it. It will take till after the weekend to get feedback because of thanksgiving.