[Plugin: More Fields] Blocks add_post_meta on another plugin

Hi

I’m having trouble getting a custom plugin to add_post_meta to a field name which is controlled in a More Fields panel.

Using add_action(“edit_post”), the more fields plugin blocks/overwrites any value that the custom plugin tries to populate. It seems to be the same on “save_post” and “publish_post”

If i change the name of the custom field to something not controlled in More Fields then add_post_meta works correctly

Has anyone come across this and found a way around?

Thanks