Maybe, maybe not, but this looks like what I got when I had accidentally unchecked the box in preferences, adjustments, horizontal.

Again, only minimal re-touching! I am getting the impression that a little sharpening before processing helps HF stack more accurately - any views?

Thought I'd share these two efforts from this spring in Gloucestershire. Very impressed with HF, especially in the speedwell photo (the blue flowers). This needed NO re-touching in HF, just the usual processing in Lightroom.

Re-touching the other picture might have gone better with a graphics ...