I'm a new user. I'm trying to use Affiniti Photo for ipad on iPad Pro 10.5".  I'm just using it as a sketching tool for the moment. I am struggling to prevent my Apple pencil switching into the color picker mode with the magnifying glass as I'm drawing (happens on every 4th stroke or so, making the app unusable for me until I sort this out). I think the problem in palm rejection (I have enabled "touch for gestures only"). As a right handed user, even when I have cleared the screen