Row Level Security not applying to some users

Hello community, 

I am currently facing an issue with Power BI. 

I have created some dashboards connected Analysis Services. 
The dashboards are shared in SharePoint via the embed option. 

I am using SSMS to manage the row-level security part. 

I am facing some issues with my dashboards. 
For users without Power BI license, the row-level security is working properly and filtering the user scope.
The dashboard is filtered using a DAX formula applied to some tables in SSMS. 

When I share the dashboard to a user with a Power BI license, the filter applied is not working properly and the user can see all the data. 
I need to be sure the dashboard is properly filtered for all the users as we are sharing very sensitive data. 

If you have faced the same issue and find a solution, don't hesitate to tell me. 

Thank you in advance,
Florian