Group fields ACF showed in editing right column

Thank you very much for your time.
It is a strange thing. I have a content type whose ACF field groups were in the edit window just below the title but now, mysteriously, they have gone to the right column under the Permalink and Comments tab.
Do you know why this has happened?
It is also curious that it only happens to one of the admins and not to all of them in the same content type. The rest of content types has no problem. I try to drag the tab from the column to the edit window but it doesn't work.
Any idea that can guide me?
Thank you very much,
Regards