Unwanted vibration especially at night

My new Lily 2 Active doesn't seem to have an option to turn off haptic vibration when you touch the bottom of the screen or press one of the buttons. I've turned off vibration from notifications, and that works ok. But when I'm sleeping and I brush up against the screen, it vibrates, waking me up. Same during the day and my sleeve brushes against the screen. Is there any option to shut that type of vibration off, or is that just a characteristic of this watch?