Incorrect raster behaviour and crashes

[qgib]

Author Name: Tony Walters (@tonywsea)
Original Redmine Issue: 21306
Affected QGIS version: 3.4.4
Redmine category:map_canvas

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I have many layers that are activated in different combinations. I have LiDAR DSMs and suddenly they now have the behaviour is that the canvas gets locked into continuously rendering the DSM over and over - only way to stop is to uncheck that LiDAR layer. Often, after this behaviour, when I try to close the project and load another, QGIS crashes with copt of dump below.

Crash ID: 71997e322a3e1d9f3a56c269670675e5530440ad

Stack Trace

QgsMapLayer::type :
QgsLayerTreeEmbeddedWidgetRegistry::removeProvider :
QMetaObject::activate :
QTimer::timerEvent :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QEventDispatcherWin32Private::sendTimerEvent :
QEventDispatcherWin32::processEvents :
DispatchMessageW :
DispatchMessageW :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QCoreApplication::processEvents :
QgisApp::addProject :
QgisApp::openProject :
QMetaObject::activate :
QMenu::~QMenu :
QMetaObject::activate :
QAction::activate :
QMenu::actionGeometry :
QMenu::actionGeometry :
QMenu::mouseReleaseEvent :
QWidget::event :
QMenu::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QApplicationPrivate::sendMouseEvent :
QSizePolicy::QSizePolicy :
QSizePolicy::QSizePolicy :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QGuiApplicationPrivate::processMouseEvent :
QWindowSystemInterface::sendWindowSystemEvents :
QEventDispatcherWin32::processEvents :
DispatchMessageW :
DispatchMessageW :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QEventLoop::exec :
QCoreApplication::exec :
main :
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.4.4-Madeira
QGIS code revision: f6ddc62
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 2.4.0
Running against GDAL: 2.4.0

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.17763

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Please attach/link sample data.

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• priority_id was changed from Normal to High
• status_id was changed from Open to Feedback

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Closing for lack of feedback.

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• resolution was changed from to no timely feedback
• status_id was changed from Feedback to Closed