(This was originally posted as a bug to https://github.com/OfficeDev/office-js/issues/4954) In New Outlook and Outlook on the Web, pinned add-ins are pushed out of view when sender address is lon...
Please consider this "feature request" as soon as possible. In fact, I would say this is a bug not a feature (https://github.com/OfficeDev/office-js/issues/4954).