Hi,
I've a custom field WYSIWYG but when I update the post the data in this field is lost. The other fields are saved correctly.
Additional information:
in the CPT "sections to display when editing" the editor is disabled as I show you in the attached screenshot.
If I enable this option, a new editor appears in the post and BOTH WYSIWYG editors save the data, but I want to use ONLY the custom field.
Unfortunately we don't have a solution for this one as the fix will need to come from the wordpress core itself. You can workaround the issue by using the Multiple line Custom Field or the use of the default content area.