Line-heights. Line-heights, unless special case, should be between 130-150 aka 1.3 and 1.5. I've noticed that often it is set to be the 1.0 or the same as the text size, which is not great for readability if it goes to multiple lines. https://www.justinmind.com/blog/best-ux-practices-for-line-spacing/

In the below proof, line-heights for title and subtitle are 1.0, but that is fine for the Title, Subtitle might run into two lines, I gave an example of it below. However, bumps into the 'y' of "by" in the title. Using responsive margins might be the best way to fix this, but adjusting the line height of the subtitle would be good too.

Dev vs Proof