You can redesign your Actions to use URL Actions instead of Action Filters. When you don't use "Show Sheets as Tabs", each dashboard renders as its own url on Tableau Online.
To pass filter values this way, you would enter each one as a url parameters (explanation in the link above).
This happened to me with a dashboard on mobile app and on our personal server. I changed the tool tip setting from responsive to On Hover, and that worked.
Thanks Dawn, I haven´t been here for a long time.
Apparenlty there´s no way to get rid of the tabs on the top.