Same problem I had and reported in another thread, along with the fix.
However when using "Navigation" or "Location" options from the main menu the map is severely distorted. Horizontal lines through map. Turning Vulkan off fixes this**.
**Update to the above:
Fixed the distorted Vulkan graphics "Navigation" or "Location" map by going to: Graphics Quality Settings > Texture Quality > adjust from MED to HIGH. On Medium settings the MAP graphics are messed up, on HIGH they are A-OK.