Strange detection when trying to find subject or object

Hello !

For a few days (maybe weeks) now, Lightroom is acting strangely when I try to find a subject.

When I click the "Subject" button in masking options, I get an error message saying it doesn't find people in the photo, hence it's classical portraits. When I try to select the person with the "Object" tool, Lightroom is giving me weird masks, here's some examples :

This shot was taken by me. You can see the "detected" masking in red.

This shot was bought in stocks. Same kind of "detected" masking in red.

I tried to uninstall and reinstall Lightroom and reset the preferences.

Is anyone having the same issue and is there a workaround ?

Thank you !