Please refer to 2 attached files...
The 'April 2020' file is correct - The yellow color is shown upon setting a filter (Release 2020.1.113.40)
The 'June 2020' file is incorrect - No color is shown indicating filter is set. (Release 2020.2.512.40)
The code sets FilterDescriptor on the 'A PARTY' column.
There is change in the icon of the filter as well :(