Simply put, my FDPs are not being assigned categories despite my efforts - see screen cap video attached. 

Steps taken:

1. Create Category

2. Select Product

3. Assign category.

The category has a spinner indicating that somethign is processing, but refreshing the page and clicking 'Only show products from this category' shows an empty category.

I have this same issue. Please can you indicate how you resolved this problem for these other customers?

Hello,

I have the same problem, is there a solution to that?

Seems to be an issue only you are experiencing. Please open a support ticket we'll need to access your wp-admin.