When google crawls our website it creates a cache. This hides the header and its not related to cloudflare or plugins, I have disabled them all and it still persists.
If you refresh the page then it works just fine.
To repeat the steps.
1. Go to google.co.uk
2. Write Japan Nakama
3. Click on our website (first result)
4. You will see the header is missing.
Alternatively, you can view the cache website on the website link below