Touch not working

Hi guys.

I’ve created a mobile game and i was testing it on iOS devices.

There is a little but really strange bug : on all the devices the game is fully working, but on the iPhone 6s
some buttons with sphere Colliders are not able to detect touch, only on this device.

To be clear, all the other colliders and buttons are working.

So,is it a Unity or iOS problem?

Does anyone have a suggestion?

Thank you very much.

It’s a strange bug with devices with 3d touch support.
On 2d colliders the touch works fine, on 3d colliders the touch has problems with the 3d touch.

Thank for the help