P: People mask works on TIFF exported from a raw but not the raw

People masking fails to detect the person shown in a raw photo but does detect the person in a TIFF exported from the raw.  That's incorrect -- the images are visually identical.

To reproduce on LR 15.3 / Mac OS 26.4.1:

1. Download and open this catalog, containing a .nef and a .tif exported from the .nef

https://www.dropbox.com/scl/fi/awz18x0px6nxb5dvauu9g/people-mask-raw-bug.2026-05-29.zip?rlkey=wy2h85fmasbr39y9q10z27mnv&dl=0

2. Select the .tif and create a People mask. Observe that it succeeds.

3. Select the .neft and try to create a People mask, and observe that it says No People Found.