Mac Photoshop with Wacom Intuos Pro and a compass-like figure on the screen??

I'm using a pretty new Wacom Intuos Pro with the latest Mac Photoshop. Every now and then it happens that when I begin to work on a detail in a photo, that is, I put my hand with a Wacom pen on the tablet, a compass-like figure with a red arrow pointing up appears on the screen. If I try to do something when this happens, very often the photo rotates in a really visible way. If the figure appears, and I just lift my hand, usually nothing happens, and the figure disappears. So far, I haven't found a way to cancel the rotation, and therefore I need to close the window. The Wacom support cannot help me in this issue. All comments welcome!