LrC Shared Photos Downloading Huge

I've been using Lightroom Classic to share albums for years using the Share & Invite feature, and this is the first time I've run into this issue.

My workflow:

• Create a shared album.
• Enable Allow Downloads.
• Send the shared link to desired party.

Recently, I’ve been told that the downloaded JPGs are much larger than expected. I confirmed the same thing myself. When downloading a single photo from the shared album, I can choose between a full-size JPG or a smaller version. However, when downloading the entire album, there is no size option, and it appears to download only the larger JPGs (my last album averaged about 8 MB per photo, some 10-20 MB).

I don't remember this being the case in the past. Has Adobe changed how shared album downloads work, or is there a setting I'm overlooking that allows entire album downloads to use smaller JPGs instead of full-size files? My goal is share reasonably compressed JPGs without having to export and upload a separate gallery.