Hi,
Thank you for pointing this out.
Could you please update the newest version of the MB Core plugin to v1.0.16 then check the issue again?
Then edit all field groups and make sure that option Show For is set to one of the list objects Posts, Taxonomies, Settings Page, Comments. See my screenshot https://share.getcloudapp.com/eDu1JzXE.
If it still happens, please take some screenshots of this issue, I will take a closer look and give a quick response.