The same on Manjaro Linux 20.2

Operating System: Manjaro Linux
KDE Plasma Version: 5.20.2
KDE Frameworks Version: 5.75.0
Qt Version: 5.15.1
Kernel Version: 5.9.3-1-MANJARO
OS Type: 64-bit
Processors: 16 × Intel® Core™ i9-9900K CPU @ 3.60GHz
Memory: 125,7 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 630


[w495@w495-nb ~]$ systemsettings5 
Cyclic dependency detected between "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
file:///usr/share/kpackage/genericqml/org.kde.systemsettings.sidebar/contents/ui/SubCategoryPage.qml:142:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/share/kpackage/genericqml/org.kde.systemsettings.sidebar/contents/ui/SubCategoryPage.qml:132:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/RefreshableScrollView.qml:137:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/RefreshableScrollView.qml:137:13: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
Cyclic dependency detected between "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
QQmlEngine::setContextForObject(): Object already has a QQmlContext
Cyclic dependency detected between "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
QQmlEngine::setContextForObject(): Object already has a QQmlContext
kf.i18n: "0 instead of 1 arguments to message {Are you sure you wis...} supplied before conversion."
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/share/kpackage/kcms/kcm_kaccounts/contents/ui/MessageBoxSheet.qml:51:17: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/OverlaySheet.qml:540:17: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/OverlaySheet.qml:366:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/share/kpackage/kcms/kcm_kaccounts/contents/ui/Accounts.qml:102: ReferenceError: noAccountsLayout is not defined
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:153:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:83:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/BreadcrumbControl.qml:24:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/SwipeListItem.qml:200:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/AbstractApplicationItem.qml:311:9: QML Binding: Not restoring previous value because restoreMode has not been set.
This behavior is deprecated.
You have to import QtQml 2.15 after any QtQuick imports and set
the restoreMode of the binding to fix this warning.
In Qt < 6.0 the default is Binding.RestoreBinding.
In Qt >= 6.0 the default is Binding.RestoreBindingOrValue.

kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
file:///usr/share/kpackage/kcms/kcm_kaccounts/contents/ui/MessageBoxSheet.qml:51:17: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
kf.i18n: "0 instead of 1 arguments to message {Are you sure you wis...} supplied before conversion."
file:///usr/share/kpackage/kcms/kcm_kaccounts/contents/ui/Accounts.qml:102: ReferenceError: noAccountsLayout is not defined
file:///usr/lib/qt/qml/org/kde/kirigami.2/AbstractApplicationItem.qml:311:9: QML Binding: Not restoring previous value because restoreMode has not been set.
This behavior is deprecated.
You have to import QtQml 2.15 after any QtQuick imports and set
the restoreMode of the binding to fix this warning.
In Qt < 6.0 the default is Binding.RestoreBinding.
In Qt >= 6.0 the default is Binding.RestoreBindingOrValue.

kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
kf.i18n: "0 instead of 1 arguments to message {Remove %1} supplied before conversion."
file:///usr/share/kpackage/kcms/kcm_kaccounts/contents/ui/MessageBoxSheet.qml:51:17: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
kf.i18n: "0 instead of 1 arguments to message {Are you sure you wis...} supplied before conversion."
file:///usr/share/kpackage/kcms/kcm_kaccounts/contents/ui/Accounts.qml:102: ReferenceError: noAccountsLayout is not defined
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"
"ktp-morse-telegram"
Looking for plugin "ktpaccountskcm_plugin_kaccounts"
Adding plugin KAccountsUiProvider(0x5563cdfa5f90) "ktpaccountskcm_plugin_kaccounts.so"
Unexpected topLevelWindows found: 4 please report a bug
Adding service "IM"
Qt WebEngine seems to be initialized from a plugin. Please set Qt::AA_ShareOpenGLContexts using QCoreApplication::setAttribute before constructing QGuiApplication.
Adding plugin NextcloudWizard(0x5563cdf93ad0) "nextcloud_plugin_kaccounts.so"
Unexpected topLevelWindows found: 4 please report a bug
Adding plugin OwnCloudWizard(0x5563cf7ff770) "owncloud_plugin_kaccounts.so"
Unexpected topLevelWindows found: 4 please report a bug
Requested UI for manager "morse" and protocol "telegram"
Creating service for "ktp-morse-telegram"
file:///usr/lib/qt/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9: QML RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop detected for property "maximumWidth"