Hello,
Did you protect the fields on AnkiHub? Here’s a tutorial: How to Manage Protected Fields.
When you protect a field on the AnkiHub webpage, it will no longer receive updates. This applies to all cards. Because of that, we have the fields “Lecture Notes” and “Missed Questions”, which will never receive updates, so you can safely protect them and use them for personal notes.
The “Extra” field, however, can receive updates. If you really want to protect it, you can do so only for a specific card:
- Right-click on a card
- Select the desired field
Let me know if this helps! 