Random Vibrations ion my 2520

[TechFranz]

Depending on how I hold or move my 2520 around it vibrates. I have it in a folio case, but have not been able to prove that any specific behavior makes it vibrate. It seems like it is something like Bluetooth, nfc or perhaps some kind of haptic feedback.

Anyone know what makes my tablet randomly vibrate?

 

[Cotswolds]

The only haptic feedback I'm aware of is when pressing the windows button.

 

[tigron]

This is happening to my tablet as well. It's actually quite frequent while holding it outside of the case sometimes it comes from handling around the keyboard connector but it also happens on other sides.