Top navigation menu no longer stays on top while scrolling

I am using your theme for my website:

However, I noticed a bug which probably happened after a recent theme update.

The navigation menu at the top no longer stays on top while a user scrolls down. This is very important to me. How do I make it stay on top again?

Hi there

Hope you are having a good day and thank you for your question
Are you using the latest version of the theme right now?
Please deactivate all third party plugins and try again your problem, most probably this I conflict with third-party plugins.
Once you deactivate all plugins please check your problem again, if the problem is gone then this means it was a plugin conflict. Now, start activating plugins one by one and same time repeat your problem until your problem appears again, now you know which plugin was in conflict Thanks!
Colorlib Support Team

The problem got fixed after I updated the theme, thanks.

I will close this case now, Feel free to contact us again if you have other questions Thanks!