iPhone 6 plus version is crashing the game

I’m using the iPhone 6 plus and it keeps closing up the app in the middle of the battle then loses red flags on adventures and loses purple flags on alliance war. All the hardwork to make it to the end was all for nothing. Its becoming a big issue for me. Please fix this issue as soon as possible. Don’t tell me that i need to upgrade a new phone which is gonna solve the issue.

Try clearing stuff from your phone. Photos. Videos.
It could be insufficient memory.

Close all other apps too.

Older phones and devices have real problems keeping up with the game, try a new device