Hey there!
What is your version of Android and what are the phone stats?
Thanks for the confirmation, if it's the 8GB version then it warrants further investigation from me. If it's a 4GB Ram version... well, I've had such reports in the past and, sadly, you can't do much more with a Unity game I think. Will try to optimize the game more for future releases regardless, thank you for disclosing this info friend!