I managed to create a 2 column blog view of articles on a Joomla 3.9 website using the guidance in this post, along with some additional linked advice on adding a "readmore":
How to show tagged items in category blog layout
However, at the following link:
https://eume.upf.org/resources/tag-blog-test?start=40
It can be seen that a gap or empty space forms after certain articles.
This seems to happen if the article in the left column is longer than the one in the right column. For example, if the title on the left goes to 2 lines, whereas the one on the right only has 1 line. Then, the subsequent article which should be in the left column is shifted.
Does anyone have an idea as to how I could fix this problem?