Hii @Faeust
We have kind of similar issue reported before I'm unable to use certain fonts on Collabora Office. How can I fix that issue?
But i see no GH issue had been filed yet. I did some research, and I can confirm that this issue exists. To track it properly and discuss it further, could you please file a bug report on GitHub? You can do so here: GitHub Issue. This will help us investigate and keep you updated.
Thanks for your help,
Darshan