I’m pretty sure this is the result of a user error. However, I would just recommend you to use something like the classic dd, if you want to put the ISO onto the stick by using Linux, anyway.
If you have any chance to use Windows to put the ISO onto the stick, I strongly recommend Rufus. There is barely anything you can do wrong when using that tool. It’s the best tool available, but only for Windows.
Additionally, look at the FAQ, for more useful information regarding this topic: