KDE Plasma crashing on current

Installed current on two laptops, updated both with the latest packages KDE 5.78.0.

When i construct a new email in Thunderbird and wanted to attach an attachment i dragged the attachment from Dolphin, but the new email message disappeared to the background because i first dragged it over the main Thunderbird screen. I then moved to the Task Panel (still dragging) to try and open the new email message. After dragging onto the Task Panel Thunderbird icon KDE restarted.
On one laptop this resulted in closing all other programs and on the other the Task Panel disappeared.

When the Task Panel only disappears there is also a KDE Bug Report which is not useful according to the KDE Crash Handler, but i think it can be useful here:

Quote:

Application: Plasma (plasmashell), signal: Segmentation fault [KCrash Handler] #4 0x0000000000000000 in () #5 0x00007f1c3c8a0690 in () at /usr/lib64/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so #6 0x00007f1c3c89fd40 in () at /usr/lib64/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so #7 0x00007f1c3c89b28d in () at /usr/lib64/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so #8 0x00007f1c55a34a19 in () at /usr/lib64/libQt5Qml.so.5 #9 0x00007f1c55a521b4 in () at /usr/lib64/libQt5Qml.so.5 #10 0x00007f1c55a56597 in () at /usr/lib64/libQt5Qml.so.5 #11 0x00007f1c559f5cbd in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext const*) () at /usr/lib64/libQt5Qml.so.5 #12 0x00007f1c55b6024d in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /usr/lib64/libQt5Qml.so.5 #13 0x00007f1c55b1730b in QQmlBoundSignalExpression::evaluate(void**) () at /usr/lib64/libQt5Qml.so.5 #14 0x00007f1c55b177b8 in () at /usr/lib64/libQt5Qml.so.5 #15 0x00007f1c55b44fed in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib64/libQt5Qml.so.5 #16 0x00007f1c540af3bf in () at /usr/lib64/libQt5Core.so.5 #17 0x00007f1c3c89ad2f in () at /usr/lib64/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so #18 0x00007f1c3c89fe8b in () at /usr/lib64/qt5/qml/org/kde/draganddrop/libdraganddropplugin.so #19 0x00007f1c560c66e8 in QQuickItem::event(QEvent*) () at /usr/lib64/libQt5Quick.so.5 #20 0x00007f1c54d6e26f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #21 0x00007f1c5407b34a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #22 0x00007f1c560e38a1 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #23 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #24 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #25 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #26 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #27 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #28 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #29 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #30 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #31 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #32 0x00007f1c560e3652 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QQuickItem*, QDragMoveEvent*, QVarLengthArray<QQuickItem*, 64>*) () at /usr/lib64/libQt5Quick.so.5 #33 0x00007f1c560e3f37 in QQuickWindowPrivate::deliverDragEvent(QQuickDragGrabber*, QEvent*) () at /usr/lib64/libQt5Quick.so.5 #34 0x00007f1c560e48a2 in QQuickWindow::event(QEvent*) () at /usr/lib64/libQt5Quick.so.5 #35 0x00007f1c54d6e26f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5 #36 0x00007f1c5407b34a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5 #37 0x00007f1c5407db01 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5 #38 0x00007f1c540cfb13 in () at /usr/lib64/libQt5Core.so.5 #39 0x00007f1c4f7b25fb in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0 #40 0x00007f1c4f7b2878 in () at /usr/lib64/libglib-2.0.so.0 #41 0x00007f1c4f7b291f in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0 #42 0x00007f1c540cf1ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #43 0x00007f1c54079e8b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5 #44 0x00007f1c54081aac in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5 #45 0x00000000004213f1 in () #46 0x00007f1c538cbe6b in __libc_start_main () at /lib64/libc.so.6 #47 0x00000000004215ba in () [Inferior 1 (process 1750) detached]