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I have a simple Drupal 10 website hosting a blog with Tag Clouds. On 10.2.7 (https://techandtravel.sinet.ca/blog/2), the summaries/teasers take up about the left 2/3rds of the screen with the Tag Clouds in the sidebar. After upgrading to 10.3.0 (https://drupal10test.sinet.ca/blog/2), about 1/3rd in the middle is white space.