Starting from buster installer rc3, and installing minimal dependencies to run, I can confirm the problem exists.
While trying to change the passphrase from gnome-disks, i.e. the old and new passphrases were entered, I see the following error message: "Error changing passphrase: Invalid argument (udisks-error-quark, 0)", screenshot attached. I have also tried to access again the disk from an external gparted after the attempt, and I could not unlock the partition with neither the old nor the new passphrase. Best,

