Have to say I thought the same. I had submitted a review for one I had already been to and written about so didn't need to describe much. I just wanted to say that things remained the same standard and write about the couple of changes there were. I thought it was long enough but I had to add another couple of sentences before it allowed me to submit it. To be honest, I thought at the time that it was just a blip.
We are oftne encouraged to review again just to confirm that a hotel is still the same standard so I would think that we could be allowed to write a shortish review.My initial rejected attempt was about 45 words