You can see a demonstration of it in the official documentation here:
Thousands of people print String objects every day without problems, so this is definitely unusual. That said, there are definitely ways you can get into trouble using the String class, and in fact some here recommend against its use.
We can probably help you out with your problem, but we'll need you to provide a minimal demonstration sketch we can use to reproduce the issue. We also need to know which board you are using.