Thanks for the suggestion, Paul. We’ve completely overhauled the stock move/container return tool on the app (for Move multi-pack between locations by scanning with phone app) and included the ability to manually enter the code in that update.
We’re just waiting for Apple/Google to approve the app update, and you’ll be able to take advantage of this improvement. Typically this takes them a day or so, but it can be a little longer. Cheers.