Custom Addin disappearing when reply/new mail in preview pane

We are facing issue with Outlook Add-in, The custom add-in disappears when draft new mail or reply for a mail in preview pane(or reading pane). If the user selects the "pop out" option on the email, then Add-in tab reappears.

Is there way to to show Add-in tab even in preview pane for new draft mail?

Attached screenshots for reference.

Ravi Nalla