Łukasz, When you get a minute, can you have a look at this modified app.
https://github.com/gregh3269/struts-examples/tree/main-test-message/validation-messagesBashing around testing, a response on one of my pages did not look correct. I modified validation-messages app and it also does the same. Not sure whether the response behaviour its correct or not due to the jsp settings.
Thanks Greg
