Dawid,
I ran it, but honestly I am not certain what I am looking for here.
I see under the Available Fields area for the development site _content lists term count as 17,137 and % as 39.59%
For the live site _content shows 0 and 0.00% so this, to my untrained eye, seems off.
Can you point me int he direction of some specific things I need to look for?