Actually the trigger is not in Breeze, but a change in kconfigwidgets 5.98.0. It just happened that doing test upgrades of Breeze also pulled in the 5.98.0 kconfigwidgets packages.
It does seem to be a reasonable change from KDE, so unclear whether this should be a KDE bug, or if it should really be a lxqt issue where lxqt mishandles such changes. KDE does not have an issue with the change, only lxqt does.
Actually the trigger is not in Breeze, but a change in kconfigwidgets 5.98.0. It just happened that doing test upgrades of Breeze also pulled in the 5.98.0 kconfigwidgets packages.
The commit that seems to be the issue is: https:/ /invent. kde.org/ frameworks/ kconfigwidgets/ -/commit/ 8c078b50fc867df 0396c7cf76ff000 a747de1043
It does seem to be a reasonable change from KDE, so unclear whether this should be a KDE bug, or if it should really be a lxqt issue where lxqt mishandles such changes. KDE does not have an issue with the change, only lxqt does.