Hello @duncan.wood-1949 and everyone!
We have released today in our v3.1.0 a new processing behavior. IF you have the Fit view processed, changing in and zooming in will no longer cause reprocessing to happen. WE would like you to test it and let us know any feedback you have 
You will be able to download this update from your app directly or by using the following link here:
- Photo AI v3.1.0 - Mac: Download or - Windows: Download
Here is the full list of changes/fixes done on this release. Please let us know if you have any issues in updating to this version!
