When using the Save As Other> Reduced Size PDF... function available in Acrobat Pro, I have discovered that in the automated optimization process, Acrobat is removing random characters throughout the text. I am only experiencing this issue using that function specifically. I do NOT experience the missing characters when I use the Save As Other> Optimized PDF... function. I am on the most Up-to-Date version of Acrobat Pro (v 22.0). There is no pattern that I can trace to which characters go missing in this process. They are typically different letters that go missing, they are not on any specific lines within the paragraphs, they are assigned the same paragraph styles as the text in the same paragraph, and do not have any special character styles assigned to the words where characters go missing.