System: Windows 10, MS Outlook, Acrobat installed preview handler
Steps to reproduce:
1. In Outlook, when receving a mail that has an attachment with more than 1 page, click the attachment once to open the preview handler
2. Secondary problem/design flaw: in the preview you cannot scroll
3. Main problem: for navigation in the pages there a "Down" and an "Up" button at the lower edge of the preview. While going down using the Down button works fine, going up again with Up button doesn't work at all.