Not able to apply changes in pdf forms
When editing the forms in the pdf from https://www.dndbeyond.com: RoughL_41551338.pdf the changes don't update the appearance (but are changed when trying to edit the same field again).
If one then saves the pdf and loads it again the changed fields appear empty, but on editing shows the changed text.
Tested editors: evince and Okular.
The pdf is handled fine by the built in pdf viewer of Firefox.
System Information
$ lsb_release -a
LSB Version: 1.4
Distributor ID: Arch
Description: Arch Linux
Release: rolling
Codename: n/a
$ pacman -Q poppler
poppler 21.01.0-1