Originally Posted by Marci
When it's locked you can still switch it of pressing the power button for some seconds - that's how it's switched off.
I think the question was how does it get switched off. It's not that easy and to happen often enough to generate a complaint is strange.
Is this a bug or a feature? Is there a software version available without this problem?
It is neither a bug or a feature, it is according to design. Password lock is designed to protect your data. Switching the device off and on does not affect data, unless the password is off when you power up.