Advanced Custom Fields compatibility

Hi,

I have some some select boxes on a post-type I'm trying to copy between sites. This post-type has extra fields added by the Advanced Custom Fields plugin. Most of the fields work but a couple do not.

I have a select box which gets pre-populated by a post-type and it saves a value to the database of type 'Post Object'.

This however is not copied across to the other sites and the attached post object also does not get copied across.

Any information on the above would be helpful to get this resolved.

Thanks,
Robert