We had coded the Perspective incorrectly. It worked with center() and then mov() if needed. But when we try to use loc() or pos() it does not work properly due to the large cacheCanvas setting enabled to handle tool handle movement.
We would have expected reporting of this to the Forum... because it was really unusable with loc and pos. So we have patched ZIM 020 with the fix. Let's hope we are not breaking an app... but it seems unlikely.
Any centered (and moved) perspective objects still work as is. Any using pos and loc will be changed to work like pos and loc always work. So check your perspectives!