Select filters value not updated – pro add-on

Hello,
I recently installed Pro add-on for Admin Columns because I need to create column sorting and especially filters at the top of items list.
I have this problem:
when I create a new item or delete it, the select filters does not update with the new values.

Eg: I have set as a filter column City.

I insert a new item with field city: London; it does not appear in filters select.
I delete an existing item with field city:Rome; Rome still appears in the select.

The values ??are updated correctly only sometimes if I create a new item.
But not everytime I add or delete field.

Why?
Thanks in advance.

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