Low memory problem (FIXED)

There is a low memory problem on some devices…
It causes often the game to crash without notifications…
At the moment it happens on my Samsung S3 and on the same device of an other friend.
I don’t know if it happens to other players…
I am trying to find what causes this problem, and why Android kills the game to free memory for other apps in background…
Not easy to debug…
Some times, rebooting the device can help, but not always…
It happens also when the game is paused, without user interaction…