Graphic Problem during long flight

Hi. I’m captain ‘Cathay 747 heavy’ in IF.
I have some problem during long flight from VHHH to RKSI.
the ground graphic sometimes suddenly turn off to like a cloud or something…and the airport is all black…
I just landed to taiwan even I can’t see the runway haha
Can I know how can I fix? Thank you.IMG_1673IMG_1672

Oh. so I have to reinstall the app again…?

Please see this: