Samsung has enhanced the user experience through its latest One UI 7 update in numerous ways, visually and functionally. It added better animations, prettier blur, and even a few extra haptic feedback effects.

Regarding the latter addition, if you ever felt like your One UI 7 phone exhibits unexplained haptic feedback taps at random when you sometimes hold it in your palm, we can confirm these vibrations are not random at all. It's the sun causing them. Well, sort of. Here's what we found out through our hands-on experiences.

It turns out that Samsung has linked a new vibration effect with sliders in One UI 7, including the volume and the brightness sliders. When these sliders reach 100%, the phone gently taps the user's palm.

Regarding the brightness slider, the weird thing is that this haptic feedback effect occurs regardless of whether you drag the brightness slider manually to the right or the automatic brightness kicks in at a hundred percent.

In other words, you might be using your One UI 7 Galaxy phone in a sunnier environment, near a window perhaps, and suddenly you feel the phone gently tapping your hand. It feels so random and faint that, at first, you might be thinking you're experiencing a negligible muscle spasm in your palm. But it's no spasm.

Exposing your One UI 7 Galaxy phone to the sun or a bright enough environment will always trigger this new haptic feedback effect — assuming, of course, that the screen's brightness goes to maximum. So, if you ever felt this vibration on your Galaxy phone after the One UI 7 update, now you know why.

We must admit, the way it happens feels odd. We understand why the haptic feedback effect should occur when manually dragging sliders to maximum. It's a nice touch, no pun intended.

Otherwise, it can be distracting whenever it happens with the auto-brightness turned on. And it bewildered us before we realized what caused this behavior. You might be minding your business, using one app or another, and your Galaxy phone keeps tapping your palm for no apparent reason. Well, the reason is now clear and has nothing wrong with your muscles or the phone's haptic motor.

Whether or not this is an intentional One UI 7 feature or an oversight on Samsung's part is another matter. For now, rest easy knowing that if your phone gently vibrates in your palm, seemingly at random, it's just the auto brightness maxing out.