Hi @rizaardiyanto,
Thank you for your response. Upon further investigation, I’ve discovered the issue is related to the JNews theme and the styling applied to the Gutenberg editor. The problem doesn’t occur when I switch to a different theme. I’ve attached a video that illustrates the issue and contacted theme support. I thought this information might be helpful to you too.
https://share.cleanshot.com/TkqSjKBd
Thanks