Thanks for your post.
The behaviour indicate the issue is related to the Adobe Acrobat plugin or the form created by the plugin. Unfortunately, we do not have any experience about the Adobe Acrobat form so unable to recommend any suggestions. We suspect you’ll have to undertake a process of elimination. For example:
- Can you re-produce the behaviour by sending a email from the shared Address Book without using the form?
- Can you re-produce the behaviour with another Address Book which is not imported by the Formativ?