When a custom field contains a repeating element, and you specify CCTM to customize columns in a post type with that field value, it just prints out "Array."
Could it instead do a quick check for array, and if so, implode() the values so they all can be displayed?
Even better, if it's a relation, could it print out an imploded list of the title of said related posts? Doing the above without this would simply result in a list of post IDs, which isn't very helpful for end users.
As always, thanks for the great work!