Due to the magnetic functionality of the The Puk Thumbstick, the 360 degree movement can be affected by interference from metal internal mobile device components. When this happens, experiment with moving your PuK Anchor to a different position, away from where the interference seems to be coming from. Most of the time, flipping your phone orientation 180 degrees and holding in the opposite orientation will allow you to place the thumbstick where you like.
If you are experiencing ‘Anchor drift’ during play, take the included ‘Sticky Disk’ and place it on the back of your device as a home for your Anchor. The Smooth back of the ‘Sticky Disk’ creates a great surface for your Anchor to bind to. Run out of Sticky Disks? The smooth backing of a piece of ‘sellotape’ (or equivalent) works just as well.