Quote source line height issue

Site URL: https://corn-algae-x23x.squarespace.com/our-story?p

https://corn-algae-x23x.squarespace.com/our-story?p

I'm having an issue with the line height of my quote source text. I want it to be the same as the paragraph text  above – I have made the values the same, but you can see the line height is much bigger for the quote source line (and doesn't look good...)

My paragraph 1 is set to 1.5rem with a line height of 1.5em – I have set the same values for the quote source, but it still looks different.

I have attempted to correct/override it by adding custom CSS, but that didn't work either so I have removed that. Seems like it might be a bug with this site, as I have not had this issue on other sites I have created.

Any thoughts would be welcome.

I should add that this issue is site-wide, not just on this particular page (though it looks the worst here, as the source line is quite long).