@apprimit Actually I too am experiencing the same issue. It’s been there for a few months now, I didn’t have time to bother about it so ignored.
I tried doing everything – clearing cache, updating theme. When I see in the ‘customise’ menu, it appears perfect in the preview, but on live site it’s different. For e.g I have chosen white for nav bar text and upon hovering, have chosen red. But it changes to grey and blue respectively in live site!!
Preview: https://imgur.com/KcItf3E
Live: https://imgur.com/rGINyck