Facebook/Meta expects to see contents or content_ids (parameters) as array (json) instead of comma separated skus, as is now.
https://www.facebook.com/business/help/606577526529702?id=1205376682832142

This reflects to wrong ViewContent event tracking. In most of the cases if we have configurable products or grouped products they cannot be tracked because of that.

Preconditions (*)

Steps to reproduce (*)

1. Open random product.
2. Check Meta Pixel Helper
3. Look for Contents and Content_ids variables.

Expected result (*)

1. content_ids

content_ids: ['123', '456']

2. contents

contents: [{id: '1234', quantity: 1}]

Actual result (*)

1. content_ids:

content_ids: '123, 456'

2. contents:

contents: ['123, 456', 'quantity': 1]