My new iPad pro arrived yesterday and I downloaded Affinity Photo immediately. I'm an Affinity Photo user on my mac and the first thing I've tried was refine selection with some awkward results! So I've tried the interactive tutorial and I get exactly the same result as before (awkward again). Shortly... the brush leave around my image artefacts and inside my image (where no brush has passed there are some unwanted trasparency). I've followed exactly the interactive tutorial, same brush size and all... and it's really annoying. I'm sure that is due to ios11 beta, but I'm developing upgrades for my apps to take advantages of drag&drop in ios11, so I can't roll back to ios10.