EM size > 1000 causes display error only in acrobat
This is a SOFTWARE BUG in Acrobat reader. This PDF is not malformed. The embedded font has an EM size of 1736, rather than 1000, and the scaling is not being done.
D Olifant shared this idea
Under review · AdminHarshpreet Kaur (Admin, Adobe) responded
Hi D Olifant,
Thank you for sharing the file. We are able to see the issue and will be working to fix the same. We will get back to you once issue is resolved.