did you suspend bitlocker or disable & decrypt before cloning? even if you don’t specifically enable bitlocker (device encryption), many newer systems enable it by default if the hardware meets certain requirements… even on base (non pro) editions of windows.
my guess is the software did a sector-by-sector clone of 237gb of encrypted partition it couldn’t read and that’s what you ended up with on the target disk, regardless of what size it configured in the partition table.