The tool bars on the right side are for flight monitoring and control. They won't show up unless the red triangle is showing the aircraft's position.
The flashing issue seems to be occurring a lot on older iOS devices that have updated to iOS 11. The new iOS update seems to eat up a lot of CPU/GPU and not leave a lot for Map Pilot. You may want to look into running with an iOS 10 device until you can upgrade to a newer, more powerful mobile device.