Constantly repaints, uses 100% CPU

samples  %        image name               symbol name
794304   47.0573  libQt6Gui.so.6.2.2       /usr/lib/libQt6Gui.so.6.2.2
544506   32.2584  libharfbuzz.so.0.30200.0 /usr/lib/libharfbuzz.so.0.30200.0
102151    6.0518  libQt6Core.so.6.2.2      /usr/lib/libQt6Core.so.6.2.2
40977     2.4276  libQt6Widgets.so.6.2.2   /usr/lib/libQt6Widgets.so.6.2.2
39726     2.3535  libTextEditor.so         /usr/lib/qtcreator/plugins/libTextEditor.so
28802     1.7063  libpthread-2.33.so       pthread_mutex_lock
27299     1.6173  libpthread-2.33.so       __pthread_mutex_unlock_usercnt

#0  0x00007fc075a8c0e9 in QTextBlock::position() const () at /usr/lib/libQt6Gui.so.6
#1  0x00007fc075a6763c in QTextEngine::formatIndex(QScriptItem const*) const () at /usr/lib/libQt6Gui.so.6
#2  0x00007fc075a6af38 in QTextEngine::resolveFormats() const () at /usr/lib/libQt6Gui.so.6
#3  0x00007fc075a5f008 in QTextEngine::itemize() const () at /usr/lib/libQt6Gui.so.6
#4  0x00007fc075a81ce5 in QTextLayout::draw(QPainter*, QPointF const&, QList<QTextLayout::FormatRange> const&, QRectF const&) const () at /usr/lib/libQt6Gui.so.6
#5  0x00007fc068d6d665 in TextEditor::TextEditorWidget::paintEvent(QPaintEvent*) () at /usr/lib/qtcreator/plugins/libTextEditor.so
#6  0x00007fc075fc477f in QWidget::event(QEvent*) () at /usr/lib/libQt6Widgets.so.6
#7  0x00007fc07604f977 in QFrame::event(QEvent*) () at /usr/lib/libQt6Widgets.so.6
#8  0x00007fc07509b680 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6
#9  0x00007fc075f7bf3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt6Widgets.so.6
#10 0x00007fc07509ceba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6
#11 0x00007fc075fb3f9c in QWidgetPrivate::sendPaintEvent(QRegion const&) () at /usr/lib/libQt6Widgets.so.6
#12 0x00007fc075fb6141 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, QFlags<QWidgetPrivate::DrawWidgetFlag>, QPainter*, QWidgetRepaintManager*) () at /usr/lib/libQt6Widgets.so.6
#13 0x00007fc075fd3cb6 in  () at /usr/lib/libQt6Widgets.so.6
#14 0x00007fc075fc45e8 in QWidget::event(QEvent*) () at /usr/lib/libQt6Widgets.so.6
#15 0x00007fc075f7bf4d in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt6Widgets.so.6
#16 0x00007fc07509ceba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6
#17 0x00007fc07509d098 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt6Core.so.6
#18 0x00007fc075289238 in  () at /usr/lib/libQt6Core.so.6
#19 0x00007fc073fa952c in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#20 0x00007fc073ffd7b9 in  () at /usr/lib/libglib-2.0.so.0
#21 0x00007fc073fa6c11 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#22 0x00007fc07528f870 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6
#23 0x00007fc0750a75e3 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6
#24 0x00007fc07509ffc6 in QCoreApplication::exec() () at /usr/lib/libQt6Core.so.6
#25 0x00005588443c4c8d in  ()
#26 0x00007fc074b5fb25 in __libc_start_main () at /usr/lib/libc.so.6
#27 0x00005588443c52be in  ()

#0  0x00007fc0758f360f in QRasterPaintEngine::drawTextItem(QPointF const&, QTextItem const&) () at /usr/lib/libQt6Gui.so.6
#1  0x00007fc075917d1e in  () at /usr/lib/libQt6Gui.so.6
#2  0x00007fc075a87cb8 in QTextLine::draw_internal(QPainter*, QPointF const&, QTextLayout::FormatRange const*) const () at /usr/lib/libQt6Gui.so.6
#3  0x00007fc075c90754 in  () at /usr/lib/libQt6Gui.so.6
#4  0x00007fc068d6d665 in TextEditor::TextEditorWidget::paintEvent(QPaintEvent*) () at /usr/lib/qtcreator/plugins/libTextEditor.so
#5  0x00007fc075fc477f in QWidget::event(QEvent*) () at /usr/lib/libQt6Widgets.so.6
#6  0x00007fc07604f977 in QFrame::event(QEvent*) () at /usr/lib/libQt6Widgets.so.6
#7  0x00007fc07509b680 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6
#8  0x00007fc075f7bf3c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt6Widgets.so.6
#9  0x00007fc07509ceba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6
#10 0x00007fc075fb3f9c in QWidgetPrivate::sendPaintEvent(QRegion const&) () at /usr/lib/libQt6Widgets.so.6
#11 0x00007fc075fb6141 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, QFlags<QWidgetPrivate::DrawWidgetFlag>, QPainter*, QWidgetRepaintManager*) () at /usr/lib/libQt6Widgets.so.6
#12 0x00007fc075fd3cb6 in  () at /usr/lib/libQt6Widgets.so.6
#13 0x00007fc075fc45e8 in QWidget::event(QEvent*) () at /usr/lib/libQt6Widgets.so.6
#14 0x00007fc075f7bf4d in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt6Widgets.so.6
#15 0x00007fc07509ceba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt6Core.so.6
#16 0x00007fc07509d098 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt6Core.so.6
#17 0x00007fc075289238 in  () at /usr/lib/libQt6Core.so.6
#18 0x00007fc073fa952c in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#19 0x00007fc073ffd7b9 in  () at /usr/lib/libglib-2.0.so.0
#20 0x00007fc073fa6c11 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#21 0x00007fc07528f870 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6
#22 0x00007fc0750a75e3 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6
#23 0x00007fc07509ffc6 in QCoreApplication::exec() () at /usr/lib/libQt6Core.so.6
#24 0x00005588443c4c8d in  ()
#25 0x00007fc074b5fb25 in __libc_start_main () at /usr/lib/libc.so.6
#26 0x00005588443c52be in  ()