Pls refer the this 1st url. It’s a custom single post page. I am having issues that some of the font size and style is changing at frontend then what I have set at the editor.
I have attached the screenshots for your ready reference. Kindly guide me how do I rectify this issue?
I believe you have a Third-party plugin causing conflict. Do you have a plugin called CubeWP? Can you try temporarily disabling it? It has CSS that’s very general in its selectors, affecting GB Headlines as well.