Unfortunately, no. I was hoping that the phantom OFF command would be a different command under-the-hood that Indigo was mapping to OFF, but it is identical to the OFF command from the working module. So Indigo is just reporting what commands it is receiving and it definitely appears the module isn't acting correctly.
Have you tried factory resetting it (which is normally an exclude and re-include w/ the Z-Stick, followed-by a resync in Indigo)?