Paragraph spacing

I have a very odd problem with Column Shortcodes, which has worked perfectly up to now:

When I add new sections (such as at the beginning of the Recent Events section of the page https://wokinghamlions.org.uk/) paragraph spacing is the equivalent of double lines so the texts is excessively spaced. Sections that were previously created are correctly formatted. However, if I add a new paragraph in a section that was previously created (by adding a line feed within the body of an existing paragraph) the new paragraph spacing is excessive but the previous paragraphs are correctly spaced.

I’ve looked at the text code and can’t see anything diferent between ‘new’ paragraphs and ‘old’ paragraphs.

This only happens within text divided into columns, so isn’t a general fault in WordPress

I am currently using WordPress 5.7 and Column Shortcodes V1.0.1.

The page I need help with: [log in to see the link]