The current version of maxima in F30 repositories (5.42.1) is two releases behind the upstream (5.43). See, for example: https://sourceforge.net/p/maxima/code/ci/master/tree/ChangeLog-5.43.md https://sourceforge.net/projects/maxima/files/Maxima-Linux/5.43.0-Linux/
FEDORA-2019-3322b86228 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-3322b86228
maxima-5.43.0-1.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-3322b86228
maxima-5.43.0-1.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.