Read more link underline is inconsistent

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- Do you want to request a feature or report a bug? Bug.

- What is the current behavior? Link underlines are inconsistent.

Chrome 60

Edge 38

- If the current behavior is a bug, please provide the steps to reproduce.

1. Go to https://staging.smashingmagazine.com/category/accessibility
2. Check "Read more" underlines consistency.

- What is the expected behavior? The space between the edge of the text and underline should be consistent across all links. I noticed that links living within .article--post__teaser element, are displayed as expected.