For example, these two photos. Why does this issue occur?

I can't completely eliminate it in hundreds of photos. A larger radius helps in most cases, but in this particular instance, a smaller radius works better. However, I still can't fully remove it.

Link to photos:
https://drive.google.com ...

I take photos using a helicon remote, increasing or decreasing focus bracketing by pressing the left and right arrows, while the model rotates on an automated turntable. Everything is done remotely, so I highly doubt the object is moving in any way. Is that the only possible explanation? The only ...

I encountered some issues with the edges of my model. In attached I giving a couple of examples with close-up and I'm curious why this is happening. Changing the settings didn’t help much—usually, increasing the radius worked for other images to make similar effects disappear. I'm not really sure ...

Out of 73 photos, 6 have errors. I’ve tried various settings, but nothing seems to help. What could be the cause of this?
I’m using a turntable, adjusting the focus with helicon remote, and taking photos — nothing else.

Photos:
https://imgur.com/a/C470JOC

Indeed, it turned out to be just a preview. Thank you for your help.

The issue only occurs when trying to save the image as a DNG. Any ideas on what I can do? I've tried adjusting the settings in preferences, but it didn't help.