Reply To: extra space after multi column block

This is by design (both in default WP block styling and the theme’s styling), because the column block is wrapped in a <div></div>, but the standard paragraphs that are not within another block are only wrapped in the paragraph tags <p></p>.

You can remove the extra space below the ALL the divs by adding this code to ‘Additional CSS’:

.single-entry-content > div {
    margin-bottom: 0;
}

…or to remove the spacing from ONLY the column block div, use this CSS instead:

.single-entry-content > div.wp-block-columns {
    margin-bottom: 0;
}