Select Subject / Refine hair bug

I am on Windows 10 platform using the latest build of PSCC.  A friend sent me a HEIC file from a phone.  I downloaded it, converted it to a Jpeg, uprezed it to a Tiff and began working on it.  Friend wanted only the figure and removal of pencil in hair.  Attached in this link are the original conversion to a Jpeg and the first attempts to select the figure and begin retouching.  The hair was very challenging and not very successful.  Here is a Dropbox link.  https://www.dropbox.com/s/rxkb0h0zab68d02/Lena.jpg?dl=0         In my experience, I run into this problem no matter what the file.  I have no problem with intial selection.  The problems begin with attempts to refine the hair.

Are you both on Windows? Are you running on an ARM based system?

Does this happen with all files or specific files? raw vs JPEG? Can you share one of the files you're having trouble creating the selection with? Post a URL to the file using CC files or dropbox, or something similar to share the file.

It may help if we could see your Photoshop System Info. Launch Photoshop, and select Help >System Info...and copy/paste the text in a reply.

I have the same problem.  I think the Refine Hair tool assumes (works best when) the subject is outlined against a solid color.  To try and refine the hair with a complicated background is impossible even when first using the Object Selection Tool first .