Hi @nathanfranklinau
Thanks for the info.
Can you confirm that the terms are saved to ‘Blog 2’ before the ‘save_post’ action is called?
Perhaps due to data available in $_POST['fields'] and cached field data that ACF is attempting to save…
Can you do some debugging in the core/fields/taxonomy.php file.
There is a function called set_terms and perhaps this is the function which is running on blog2 when it shouldn’t be.
Can you place some debug code in that function and see if it runs on blog2? Perhaps the solution is to clear the value of $this->set_terms after the foreach loop on line 253
Thanks
E
