Over the last couple of weeks I noticed an intermittent and annoying problem. Plasma running on Wayland crashes when I move the mouse towards the tooltray
or bottom panel.

Windows remain open, but all the tabs and KDE menu are gone, along with the wallpaper. I drop into a console and restart the display-manager service, to be able to login again into Plasma-Wayland.

I don't understand why this problem has started recently and this is the only system it happens. Other machines work fine. This is what I see in the ~/.local/share/sddm/wayland-session.log file after a crash:

Cannot initialize model with data QJsonObject(). missing: QJsonValue(string, "urls")
qt.qpa.wayland: Wayland does not support QWindow::requestActivate() qt.qpa.wayland: Wayland does not support QWindow::requestActivate() qt.qpa.wayland: Wayland does not support QWindow::requestActivate() qt.qpa.wayland: Wayland does not support QWindow::requestActivate() qt.qpa.wayland: Wayland does not support QWindow::requestActivate() org.kde.pim.akonadiserver.search: Executing search "kmail2-1066726089- SearchSession"
org.kde.pim.akonadiserver.search: Search "kmail2-1066726089-SearchSession" done (without remote search)
org.kde.pim.akonadiserver.search: Executing search "contactsCompletionSession" org.kde.pim.akonadiserver.search: Search "contactsCompletionSession" done (without remote search)
org.kde.pim.akonadiserver.search: Executing search "contactsCompletionSession" org.kde.pim.akonadiserver.search: Search "contactsCompletionSession" done (without remote search)
org.kde.pim.akonadiserver.search: Executing search "kmail2-1066726089- SearchSession"
org.kde.pim.akonadiserver.search: Search "kmail2-1066726089-SearchSession" done (without remote search)
org.kde.pim.akonadiserver.search: Executing search "kmail2-1066726089- SearchSession"
org.kde.pim.akonadiserver.search: Search "kmail2-1066726089-SearchSession" done (without remote search)
org.kde.pim.akonadiserver.search: Executing search "kmail2-1066726089- SearchSession"
org.kde.pim.akonadiserver.search: Search "kmail2-1066726089-SearchSession" done (without remote search)
org.kde.pim.ksmtp: SMTP Socket error: QAbstractSocket::RemoteHostClosedError "The TLS/SSL connection has been closed"
org.kde.pim.ksmtp: SMTP Socket error: QAbstractSocket::RemoteHostClosedError "The remote host closed the connection"
Could not find the Plasmoid for Plasma::FrameSvgItem(0x7f1b78014330) QQmlContext(0x55ea6da06360) QUrl("file:///usr/share/plasma/plasmoids/ org.kde.plasma.notifications/contents/ui/global/Globals.qml")
Could not find the Plasmoid for Plasma::FrameSvgItem(0x7f1b78014330) QQmlContext(0x55ea6da06360) QUrl("file:///usr/share/plasma/plasmoids/ org.kde.plasma.notifications/contents/ui/global/Globals.qml") file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/ NotificationItem.qml:222:21: QML SelectableLabel: Binding loop detected for property "implicitWidth"
org.kde.pim.akonadiserver.search: Executing search "searchUpdate-1679350681" org.kde.pim.akonadiserver.search: Search "searchUpdate-1679350681" done (without remote search)
org.kde.pim.akonadiserver.search: Search update for collection "OpenInvitations" ( 96 ) finished: all results: 0 , removed results: 0 org.kde.pim.akonadiserver.search: Executing search "searchUpdate-1679350681" org.kde.pim.akonadiserver.search: Search "searchUpdate-1679350681" done (without remote search)
org.kde.pim.akonadiserver.search: Search update for collection "DeclinedInvitations" ( 97 ) finished: all results: 0 , removed results: 0 kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x55ea6d71a530)
kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x55ea6d71a530)
kf.plasma.quick: Couldn't create KWindowShadow for ToolTipDialog(0x55ea6d71a530)
error in client communication (pid 4322)
wl_display@1: error 0: invalid object 254
The Wayland connection experienced a fatal error: Invalid argument
Service "org.kde.StatusNotifierHost-4322" unregistered

Any idea what causes this and how I could fix it?
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