Hi In some cases, applications may crash when the fontEngine is loading glyphs. Backporting this Qt fix should help: https://codereview.qt-project.org/c/qt/qtbase/+/724504 Example bug reports: - https://bugs.kde.org/show_bug.cgi?id=518105 - https://bugs.kde.org/show_bug.cgi?id=519722 Best regards, - Akseli