Blog page has broken (I think since WP 6.3)

Hi there, my blog page seems to be broken and I think this might coincide with the latest WP update. https://blubrain.co.uk/blog/ Also, I think the formatting on the blog is slightly different. https://blubrain.co.uk/comprehensive-guide-to-stem-cell-therapy/ Take a closer look at the line spacing between the different H2 sections and text. I'm sure it's not right and has changed. I think the theme is slightly broken.