Preconditions:

• Added catalog
• Added virtual product with availability status 'not available'
• Added virtual product with availability status 'available'
• Added physical product with availability status 'not available'
• Added physical product with availability status 'available'

Steps to reproduce

1. Log in to back office.
2. Go to Product-catalog / Catalogs
3. Edit catalog from preconditions.
4. Add 'Availability' filter with an option 'Available'.
5. Verify displayed products and their statuses.

Actual result:

Virtual products are not properly filtered in catalogs by availability filter (virtual products are treated as available in stock even if their status is not available).

Expected result:

Properly filtered virtual products by availability filter.