Once upon a time, Vojtech Trefny vtrefny@redhat.com said:
This is also what happens if you choose to "decrypt" your BitLocker volume in Windows so if it is this case, cryptsetup doesn't support it. We intentionally ignored this case mostly because it looked like a small corner case (if you choose do decrypt the volume, Windows will in the end fully decrypt the data and get rid of the BitLocker volume/container), but if it's going to be a widespread use, we might need to start looking into that. As Milan said, a reproducer and an upstream issue for cryptsetup would be nice.
Unfortunately, I don't know a reproducer, other than "buy a Thinkpad". I don't actually know much about Windows stuff.