Hello,
1) I don’t see problem applying changes for the home page header if I edit that. So, make sure that you editing the home page header https://gyazo.com/e90b85668375ab1154221305b41776a7
2) Could you, please, tell me what content of the HTML block do you want to change? Provide example and I’ll try to change it because at this moment I don’t see the issue.
Regards
