It's prbly a device issue, yes. May I ask for your device's brand? Is it Google? Samsung? LG?
it's 'itel A60s' a budget phone but with good specs, maybe because it's a unknown/new brand it doesn't work the best with Ren'py.
It's probably a device issue that we're having, some AVNs I tried installing (RPA with/out) crashes frequently. Some I can't even go past the menu because it'll crash after some time.