Apple Magsafe Battery Pack
I have a fully charged Apple Magsafe Battery Pack. When I attached it to my iPhone 12 Pro Max, the amber/orange light keeps flashing and my iPhone is not even charging. I had to remove it, plug the battery pack to a cable with 20W adapter and then re-attach it to my iPhone again to make it work. Is there a defect in the battery pack? Please advise.
iPhone 12 Pro Max, iOS 16