I've setup a field group and it's in draft mode. Out of nowhere, after adding more fields, I realized that the field group loses its settings and returns to default values. I am unable to change the field group id, in settings the assigned post type returns to default "post" and can't be changed, and in the "Get PHP Code" section the values for "Text domain" and "Function name" lose their values, have the default "your-text-domain" and "your_prefix_function_name" and also cannot be changed anymore.
Well, things can be changed in the form fields, but saving the fields group won't have any effect.
I also lost some fields that have been previously configured (all of them being on the end of the list).
I thought there is something wrong internally and created a whole new field group with the desired fields from scratch. It all went well until I entered the 24th item. Then, the whole effect appeared again with this just newly created new group - without any obvious reason.
In both field groups I count 24 items. Among these 24 items are 7 tabs.
What is going on? Any help appreciated.
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