Hi Umpftata, and thank you for your bug report!
You are right, there was a bug in the English version, which did not occur with the Italian one, and it depended on the length of the word to guess.
I apologize for the problem.
I just fixed it (for the C64 target, both prg and d64 format). As soon as possible I will publish an update for the other executables too. In the meantime you can download the game again.
I fixed the issue.
Thank you again!