I’m seeing two issues that I think have been around for a long time but I’ve not looked to report. When I tweak a bunch of settings, eventually/sometimes the preview stops updating even though it will show the progress bar and say “Preview Updated” – it is like the preview is frozen on the unedited image. Changing the zoom will get the preview to work again.
And when initially I use the magnification menu to go to 400% for fine inspection, it doesn’t zoom into the center of the image, but zooms to the top left of the image. This only happens the first time I change the zoom. (PS: I wish I could pinch on the touchpad to zoom.)
Topaz Photo AI v1.3.1 on Macbook Pro with M1 processor, invoked from Apple Photos as external editor, on JPG.