Hello! Thank you for the feedback.
Could you please send to support@osmand.net mentioned GPX file and crash log, from Menu – Help – Help improve OsmAnd – Send logcat log.
Hello! Thank you for the feedback.
You can try to use the new rendering engine, it can be enabled in Menu – Plugins – OsmAnd Development – Use OpenGL rendering.
If it doesn't help, please contact us at support@osmand.net