Just out of interest, what level of Frescobaldi are you using?
I use the Frescobaldi version that is shipped with the Fedora 35 repositories: frescobaldi-3.1.3-6.fc35.noarch
The "about" dialog inside Frescobaldi shows: Frescobaldi: 3.1.3 Extension API: 0.9.0 Python: 3.10.0 python-ly: 0.9.7 Qt: 5.15.2 PyQt: 5.15.6 sip: 6.1.0.dev2104271705 poppler: 21.1.0 python-poppler-qt: 21.1.0 OS: Linux-5.14.16-301.fc35.x86_64-x86_64-with-glibc2.34 -- MT
