That's an old bug but it's still valid one. I was looking around the code to see if that's maybe some simple bug that I can fix ad-hoc but I come to conclusion that there is quite a bit of code missing. The GTK version have support for functions that are lacking in KDE. So it's more "not implemented" than just a bug.
Reference: https://github.com/linuxmint/ubiquity/blame/master/ubiquity/plugins/ubi-partman.py PageGtk vs PageKde -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1510730 Title: Ubiquity installer crashes when editing manual crypto partition To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1510730/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs