Klaus was aware he was wasped. He did manage to tell Philbert a coded story that Tarvek decoded.
https://www.girlgeniusonline.com/comic.php?date=20120210

Also possible, he knows he has been frozen in Mechancisburg for over two and a half years. It's now 2 1/2 years later than his last memory, especially if he has only recently been removed from the town. So Tryggvassen, Boris, Thorpe, Martellus allied is a strange future he is now in.

Just my thoughs.