Syncing Slicers

Hi everyone,

I have just started using POWER BI march 2018 version.

I've created a dashboard including 2 pages, each one of them is based on a different table from the database.

Both tables have some mutual columns, one of them is called 'domain department', and I want to be able to filter my visualizations by 'domain department' at both pages at once with one slicer only, instead of different slicer for each page.

Since the columns don't contain exactly the same values, i have created a domain departments table (one column only, of the departments names), which each value in it is unique. I created "1-Many" relationships between each table and the domain departments table. At this point i have created a slicer that filters both pages according to the domain department parameter (using the 'sync slicers' option). And here's the problem:

on one page it works perfectly, but on the seconf page it filters the graphs only for 2 values of the slicer, and choosing any different value completely clears all the visualizations at that page. Any idea of how can i fix this?

Thanks a lot!

nofar