Description of problem:
Running Fedora 42, KDE Edition, currently on KDE 6.4.1.  Intel Arc A770 GPU, Ryzen 5900X CPU.  Kernel 6.15.4-200.

Issue started happening recently after a systemwide update; when sleeping, the KDE session crashes for unknown reasons.  SDDM eventually returns and allows starting a new session with everything reporting a "crash".

This issue occurs either through user-attempted sleep or auto-sleep after a timer.

Version-Release number of selected component:
sddm-0.21.0-9.fc42

Additional info:
reporter:       libreport-2.17.15
type:           CCpp
reason:         sddm-greeter-qt6 killed by SIGSEGV
journald_cursor: s=de28d35e5a654c9e8601fbb4ba657fd8;i=11b3a71e;b=2529d54f2b1d427a8463e7197ccb6029;m=9fc06c;t=638b949ca297f;x=3638d6de86aee5ff
executable:     /usr/bin/sddm-greeter-qt6
cmdline:        /usr/bin/sddm-greeter-qt6 --socket /tmp/sddm--AqpOze --theme /usr/share/sddm/themes/01-breeze-fedora
cgroup:         0::/user.slice/user-985.slice/session-c1.scope
rootdir:        /
uid:            985
kernel:         6.15.3-200.fc42.x86_64
package:        sddm-0.21.0-9.fc42
runlevel:       unknown
dso_list:       /usr/bin/sddm-greeter-qt6 sddm-0.21.0-9.fc42.x86_64 (Fedora Project) 1744200814
backtrace_rating: 3
crash_function: QtWayland::wl_seat::object

Truncated backtrace:
Thread no. 1 (32 frames)
 #0 QtWayland::wl_seat::object at /usr/include/qt6/QtWaylandClient/6.9.1/QtWaylandClient/private/qwayland-wayland.h:789
 #1 QtWaylandClient::QWaylandInputDevice::wl_seat at /usr/include/qt6/QtWaylandClient/6.9.1/QtWaylandClient/private/qwaylandinputdevice_p.h:96
 #2 QWaylandXdgActivationV1::requestXdgActivationToken at /usr/src/debug/layer-shell-qt-6.4.1-1.fc42.x86_64/src/qwaylandxdgactivationv1.cpp:38
 #3 LayerShellQt::QWaylandLayerSurface::requestActivate at /usr/include/qt6/QtWaylandClient/6.9.1/QtWaylandClient/private/qwaylandwindow_p.h:141
 #4 SDDM::GreeterApp::addViewForScreen at /usr/src/debug/sddm-0.21.0-9.fc42.x86_64/src/greeter/GreeterApp.cpp:231
 #5 QtPrivate::QSlotObjectBase::call at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
 #6 doActivate<false> at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4146
 #7 QMetaObject::activate at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4206
 #8 QMetaObject::activate<void, QScreen*> at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs.h:306
 #9 QGuiApplication::screenAdded at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/redhat-linux-build/src/gui/Gui_autogen/include/moc_qguiapplication.cpp:300
 #10 QtWaylandClient::QWaylandDisplay::handleScreenInitialized(QtWaylandClient::QWaylandScreen*)
 #11 QtWaylandClient::QWaylandScreen::maybeInitialize()
 #12 ffi_call_unix64 at ../src/x86/unix64.S:104
 #13 ffi_call_int at ../src/x86/ffi64.c:673
 #14 ffi_call at ../src/x86/ffi64.c:710
 #15 wl_closure_invoke at ../src/connection.c:1228
 #16 dispatch_event at ../src/wayland-client.c:1674
 #17 dispatch_queue at ../src/wayland-client.c:1820
 #18 wl_display_dispatch_queue_pending at ../src/wayland-client.c:2062
 #19 QtWaylandClient::QWaylandDisplay::flushRequests()
 #20 QObject::event at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1431
 #21 QCoreApplication::notifyInternal2 at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
 #22 QCoreApplication::sendEvent at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1546
 #23 QCoreApplicationPrivate::sendPostedEvents at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1879
 #24 postEventSourceDispatch at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:246
 #26 g_main_context_dispatch_unlocked at ../glib/gmain.c:4249
 #27 g_main_context_iterate_unlocked at ../glib/gmain.c:4314
 #28 g_main_context_iteration at ../glib/gmain.c:4379
 #29 QEventDispatcherGlib::processEvents at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:399
 #30 QEventLoop::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/global/qflags.h:77
 #31 QCoreApplication::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1449
 #32 QGuiApplication::exec at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:1986