Makes sense that it's a bug.
Bug fixes come as workarounds, and eventually re-issue/replacement.
In this case, re-flashing the U-Boot could be done, but there's a risk of bricking the board (yeah, yeah, I know about the JTAG pins on the Samtech connectors - but I don't have any).
The U-Boot re-flash instructions would need to be simple and bullet-proof. Here's waiting...
Still cross checking the boot script workaround on my two boards, using the addresses you've identified, but it's looking good.
Whether it's garbage or not
Cheers,