This could be the case. The accommodations on our website are distributed throughout various channels. Sometimes you are just too late and the accommodation is booked by someone else while you are still filling in your details. However, it is also possible that you have already clicked on the accommodation and that it will "hang" in the supplier's system as "pending". In this case, the accommodation will return to available after about half an hour to an hour. We can not see if it is indeed pending, in these situations you will have to be patient and try again later.