Android launch sometimes won't load maps

[SeldinG]

This doesn't happen all the time but when it does it's annoying. Sometimes when I launch to the phone, the game loads up to the main menu but upon hitting play or any level I get a travel error which is it can't find the map for some reason so it won't load. It loads in the editor but not on the phone. The only thing I can think of is data corruption because it only happens once in a while but I have to exit Unreal, delete the app from the phone, relaunch unreal, and relaunch to the phone. And this isn't always a quick fix. I might have to rinse and repeat a few times. Any thoughts?

Edit:
This is continuing to happen. Has no one else encountered this?

[SeldinG]

For anyone else having this issue, this seems to help. Go to Project Settings and turn on "cook everything" under packaging.

[FSapio]

For anyone else having this issue, this seems to help. Go to Project Settings and turn on "cook everything" under packaging.

A slightly better solution is to go onto Project Settings - > Packaging and then specify the maps you want to cook directly inside "List of maps to include in a packaged build". As a result, you can cook only what you need.