Issue Copying/Pasting Profiles After New Lightroom Classic Update (v 15.0.1)

I edit professionally using smart previews in Lightroom Classic for a number of clients that use a variety of different color profiles. I do not personally own every profile that my clients request that I use, but that hasn't been an issue in the past since I have always been able to copy the "Treatment and Profile" settings from their edited sample images, and paste the profile onto the unedited images. Even though it would have a warning saying "Profile Missing," I found that this trick still worked for both me and my clients.

However, after updating my Lightroom today, it is no longer copying these missing profiles over to any other new images. Even if I paste all settings from the previous photo, all edits and adjustments will copy over to the new image, but the profile will stay the default Adobe Color. Any tips on how to possibly fix or work around this issue? I have gone in and redownloaded version 14.5.1 of Lightroom Classic and reconfrimed that I can copy/paste missing profiles in the old Lightroom version, but not this new one. Any help would be appreciated. I am using an Apple MacBook Pro, M3 Pro chip, running Sequoia 15.6.