Fault removal module problem

[T-O-04]

Hello,
Since the lightroom update, the fault removal module no longer works the same way. Here is an example between an old version and the new version of lightroom with the same image. The new version of lightroom reveals a really disturbing gradient for my post-production
Do you know why it does that?
Sorry if my english is not great

Thank you !

[cmgap]

It is difficult to see the problem in the images that  you posted. I've tried the tool and am not seeing a difference in behavior. Have you added a  vignette on this image? What happens if you use the healing brush  before you add  the vignette?

[GoldingD]

Two of the sliders are  not set to the same values, did you change that?

[T-O-04]

Thank you for your reply,
Here are three new images, perhaps more convincing (raw photo, photo with correction on old lightroom old version, photo with correction on lightroom 2020), no difference in slide this time. We can see that the corrector no longer works the same way on a photo corner. You can see a color gradient between the background and the normally corrected background. It's exactly the same manipulation between the two, nothing has changed