If it's true, that would be a very weird development, considering carnotourus is behind a leafy screen in B mode. Presumably, someone would need to actively make the choice to show him to guests, and they couldn't accidentally have him visible.
And yes, anyone who has been on Figment's ride lately would probably say "it's totally believable they showed a blatantly broken animatronic on purpose", but Figment's horrible, broken animatronics don't have functioning B modes that have been working as fine as they're supposed to for months. Carnotourus does.
Again, if it's true, maybe B mode broke and they figured it was worth trying the broken "real" one rather than having none? The B mode head looks unusually dark (could be camera quality, but normally his entire head is lit not just the teeth) in the other video posted.