PowerBI report filtering when table or column name has underscores in names

Hi,

I'm try to filter a powerbi report from report server with url parameters. My tables and columns have underscore in names like "table_name" and "column_name". When I try to filter the report using url: 
https://server/report?filter=table_name/column_name eq 'Item' 

I even tried by removing the underscores from names but to no effect. I checked the docs but nothing is said about underscore being considered a special character.