One day, I was collecting my money buildings, as I normally do, and see the game slow down horribly as normally happens, but this time Modern War caused my device to restart itself. After it happened, everything went back to normal, and I experienced nothing of the issue.
I know it's not my device.
I am using a Google Nexus 7(old one) running Android 4.3 with a quad core processor and 1GB of RAM
It was on the current version of Modern War.