I’ve just tested this and I’m not seeing any issue with the weight field in WC.
What could cause this?
Possible Answer:
You have created a field with the name “weight” in ACF. The field name that is used by WC is “_weight”. ACF uses the meta key of “_weight” to store the ACF field key reference for this “weight” field. The random number you are seeing is probably the numeric portion of ACF’s field key for the field.
Possible Solution:
Rename the ACF field and avoid using field names that exist in plugins used on your site when attaching them to WP objects that use those fields.
