With libvirt socket activation in Fedora 31, libvirtd may be started and stopped transparently many times while a host is running. domain/network/storage autostart is tied to daemon startup, so objects may be repeatedly started even after the user has manually shut them down. Fixed upstream, we should backport this to F31: https://www.redhat.com/archives/libvir-list/2019-October/msg00214.html
FEDORA-2019-8a6d24ceec has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2019-8a6d24ceec
libvirt-5.6.0-5.fc31 has been pushed to the Fedora 31 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-2019-8a6d24ceec
libvirt-5.6.0-5.fc31 has been pushed to the Fedora 31 stable repository. If problems still persist, please make note of it in this bug report.