"Refine search by trait" filters doesn't work properly

This issue can be reproduced only on the production server "https://www.genesys-pgr.org"

Steps:

1. Go to the "https://www.genesys-pgr.org";
2. Click on the "Browse" menu item;
3. In the "Crop name" filter select any crop "Apple" for example;
4. Click "Apply" button;
5. Click on the "Refine search by trait" filter;
6. Click on the "Select traits" button;
7. In the appeared pop-up, mark any chec-kbox "Awn color" for example;

Act.res.: See attached screen: