Czech diacritics render as boxes in highlighted multiline DoNotScroll AcroForm text field
Adobe Acrobat incorrectly renders newly typed Czech diacritics as square boxes in a multiline AcroForm text field when field highlighting / border hover color for fields is enabled and the field has scrolling disabled via the DoNotScroll flag.
Steps to reproduce:
1. Open the attached "DiacriticsnoScroll.pdf" in Adobe Acrobat / Acrobat Reader.
2. Enable the Forms preference:
"Show border hover color for fields"
/ field highlighting for form fields.
3. Click into the multiline text field.
4. Place the cursor at the end of the existing text:
"Vážený pane Lorem Ipsum,"
5. Type Czech characters, for example:
č ř ě
6. Observe that the newly typed characters are rendered as square boxes.
7. Disable the field highlighting / border hover color option and repeat the same steps.
8. Observe that the same characters render correctly.
9. Do it the same steps with the attached "Diacriticsscroll.pdf" and observe that the characters render correctly.
Expected result:
Newly typed Czech characters should render correctly in the text field regardless of whether field highlighting is enabled and regardless of the DoNotScroll flag.
Actual result:
When the field is multiline and has DoNotScroll set, Acrobat renders newly typed Czech diacritics as square boxes, but only when field highlighting / border hover color for fields is enabled.
