Hi,
I have the problem that the fields are also not displayed to me, or not loaded. In edit mode, I see the fields and content, so I started the database update again as described in the FAQ. Unfortunately without success. I use the fields to embed javascript and CSS on two pages. Unfortunately this code will not be loaded.
Today from 4 to WP 5.0.3. ugedated, since then the problem occurs.
Many Thanks