Bug 471796

SUMMARY
When clicking "show forms" and filling in, everything looks fine. However, clicking "Show forms" again after filling in text, `æ` and `å` just disappears while `ø` is changed to `ł`. If filling in `ł` it disappears.

Font sizes are also distorted, it seems Okular adjusts the size to fill each form entirely, rendering the document layout ugly. Printing uses the wrong display, even if forms are currently showing the correct characters.

STEPS TO REPRODUCE
1. Download https://www.politiet.no/globalassets/02-tjenester-admin/politiattest/bekreftelse-pa-formal-med-soknad-om-politiattest.pdf
2. Open with Okular and click "Show forms". Fill in text containing special characters (the Norwegian æ, ø, å or others like ł or µ)
3. Click "Show forms" again.

OBSERVED RESULT
Text is incorrectly displayed and printed

EXPECTED RESULT
Text should be correctly displayed and printed

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 5.15.114-2-MANJARO (64-bit)
Graphics Platform: X11

ADDITIONAL INFORMATION
Filling in forms / saving / opening / displaying in Firefox works as expected. Printing to pdf from Firefox and opening in Okular, characters display correctly but font sizes are inconsistent.