hi, using extra theme and its theme builder with Meta Box for Custom Post Type.
I don't know who's bug is this from i.e divi or MetaBox!
when enabling the custom field with separate table(in the setting menu of custom field) to store meta data along with prefix, I could not find the values display in Divi theme.
But if i remove the prefix from the table it displays the values perfectly.
FYI: in both case i.e with prefix or without prefix I have added the values & tested
in simple, in advance setting separate table without prefix only works.
please do fix the same from your end if it is a bug
for your reference, here is the video link
Hope you will this to your development team