Thanks again, I was able to use your on change code to understand how the relationship behaved. I also used http://v2.wp-api.org/ and https://wordpress.org/plugins/acf-to-rest-api/ to pass the ID: (‘.values input’).val() in order to pull in the acf meta from the selected post.
I really appreciate the direction, thanks for your help!
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Thank you! I absolutely agree that it’s more work than needed, I’ll communicate this to the designer.