Thanks for the info ! Note that the PPA doesn't actually have a disco build, so you are using the cosmic one on a disco system. I'm not sure if this could cause problems if it is trying to use things that aren't there (?), it might be totally fine.
Also note that 1.3.X is a pre-release series so is moving at a faster pace than 1.2.X and might have bugs. I have tried installing flatpak (from the archive) on a fresh Ubuntu 19.04 VM with my font set to Roboto 11 and calculator works. So it could be an issue with using a cosmic build from the PPA, it could be an issue with 1.3.X, or maybe something needs to purge/refresh old font caches or something when an upgrade is performed. I think the best thing is probably to discuss this upstream as they are more likely to know the cause, and then report an Ubuntu bug if relevant. So I'd suggest opening a bug here https://github.com/flatpak/flatpak/issues describing your issue and feel free to link back to this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825664 Title: Fonts broken in flapak apps To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/flatpak/+bug/1825664/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs