Attached the screen shot of Menu's actual look and which has issue. The issue is happening some times, I couldn't replicate the issue. Please let me know how to fix it.
We need more information in order to help you with this - if you aren't able to replicate the problem, I'm not sure how we're going to be able to either.
Let's start with: what version of px-app-nav are you using? I'm worried by the blue text in your screenshot because, unless you're overriding the default white text, you may be using a very old version of the component. The latest pre-Cirrus version of px-app-nav is v1.10.13, so my first recommendation would be to make sure you are using that version if possible.
