But you don't know which IMU is misreporting. Now, given the nature of the situation you could probably say it's best to err on the side of acceleration. If you've stopped accelerating and haven't initiated landing procedures you're either wrong or somehow already landed and can afford to wait.

It's also not clear to me that this was an issue of erroneous data. All they said so far was that a rotational sensor maxed out for about a second. I don't think a simple delay-and-retry would have sufficed here. When attempting to land a second seems like a pretty long wait.