It’s weird for me regarding this issue. I also tried the code on above on my local server but it just works fine on my side.
In this case, can you please try to disable all plugin except required plugin that related to JNews. If you still getting the problem, I might need to check it directly on your website. In this case, please provide me login credentials into your wp admin panel and you can send it here and don’t forget to check Set as private reply option below.