I still have the problem (3rd batch framework ordered August 2021, Windows 10). It hasn’t been resolved by a ticket (on-going since February 2022). I’m thinking of reviving the 1 TB disconnect thread since this is where the most people noticed the problem. I at least have some more info to help people (e.g. a powered hub has helped me, and my problem appears to be usb-3 related. usb-2 connections don’t seem to disconnect). I’ll try to summarize what I’ve found if I do revive the 1 TB disconnect thread, though you can find info currently in these threads:
http://community.frame.work/t/responded-quirky-usb-port/
http://community.frame.work/t/responded-1tb-expansion-card-disconnects-randomly
http://community.frame.work/t/samsung-external-ssd-not-recognized/
http://community.frame.work/t/connectivity-problems-with-external-drive-when-connecting-over-usb-c/