H4 placeholder text always displays in preview

Hi again – you have a bad style in this latest release (1.29.3), which causes “H4” to be appended to any Heading 4 text in Preview/editor mode.

I believe it’s line 83 of /src/styles/editor.scss:

h4::after {
  content: "H4";
}

All the other headings in that file use:

h5.wp-block[data-type="core/heading"]:not(.is-selected)::after {
  content: "H5";
}