Issues with Open Sans font (same font but letters appear different sizes)
We use Open Sans font as a default. In both Acrobat and Reader, letters of the same font display as different sizes. The issue is most visible with "e" and "a".
The issue is not present in Acrobat Web.
I have tried updating the software, reinstalling the Open Sans font, adjusting the smooth text rendering.
In Document Properties > Fonts, the Open Sans fonts are marked as (Embedded Subset) and set to Encoding: Built-in.
See example below (screenshot of PDF content):

