That’s way more than enough , i’m sure the devs are ahead of this and are aware of the FPS drops and rendering issues.
Here are my top tips to reduce the chance of crashes, do let us know if they help :
1 - Restart device before doing a flight ✈️
2 - Lower your airplane count to a lower setting
3 - Lower your 3D Object density / rendering resolution / Texture quality (For me personally i started putting 3D object density to medium from high and this helped a lot and i haven’t had any crashes since)
4 - Lowering your frame rate
Do let us know if this helps!
If this issue persists then do go ahead and delete and reinstall the app! as your last option
On top of all the amazing suggestions above, another one which hasnt been mentioned is device care. Make sure that your device is running at optimum by going into device settings and optimising it before opening IF and also make sure to have as least (best is none) apps running in the background.