TIPES is used by a lot of fanciers here in Ireland and is a reliable system. Those that have it are quite happy with the system. If you put http://tipes.de/eng/ into your search bar you will find all the info you need on the site.
I would say that is the most probable cause, especially if your in an area were the racing batches go over. These days the batches are all over the place with peregrine strikes.