Nokia 2720 Flip restarting

[Guilherme]

I've bought a Nokia 2720 flip and whenever I open and close the lid, after 30 seconds when the second screen turns off KaiOS restarts all of a sudden. I though that it could be a battery problem since it's lasting just one day in standby, so I bought another one and the problem is just the same, and still remaining one day in standby. Also tried factory reset.