Description of problem: ...due to the fallback snippet's reliance on the line set boot_success=0 from the menu hide script. Additional info: for the original issue, see here: https://github.com/rhboot/grub2/issues/48 A patch to fix this has been accepted in fedora-31 branch of the grub2 repo, needs backporting.
grub2-2.02-77.fc30 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-fc18df9140
grub2-2.02-78.fc30 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-37b067704a
grub2-2.02-78.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-2019-37b067704a
grub2-2.02-78.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.