You can not create a scorecard from infacmd. You can execute existing scorecards using infacmd ps command. However, can you share the details of the bug you are referring to?
while you can't create them via the cmd line, you can export/import.
Once you get a scorecard created, you could export the objects and if for some reason it gets deleted you can reimport it.
Closest thing you can have.
Similar to what Scott said; If you do not have an export but have a MRS backup from a prior time when lost scorecards were present in the MRS - this MRS could be restored in a dummy MRS service ( newly created in any domain ) and then the scorecards can be extracted from this restored MRS. This shall of course be very cumbersome but can serve as the last resort.