Interactive element does not meet minimum size nor spacing
Siteimprove flags this issue when the size of a link may be too small for someone to activate either with the mouse or by touch.
Siteimprove calls this out as Interactive element does not meet minimum size nor spacing, and it violates WCAG 2.2: Understanding Success Criterion 2.5.8: Target Size Minimum. It will show up in Siteimprove as a dotted red box.
Inadvertent multiple links
Although there are multiple reasons this issue occurs, most likely when using the text editor, multiple links were inadvertently created when only one was intended.
In the example screenshot, the period, ".", is a separate link.
In this case, to fix this, it's best to edit and re-apply the link to the text. See Add links to text.

Use a list instead of <br> for multiple links
It is possible to reduce the spacing between two lines of text by using shift+enter instead of using enter alone. Using the text editor, pressing shift+enter inserts a break (<br>) element, while pressing enter inserts a paragraph element (<p>). When using a break to separate links, the reduced amount of spacing also creates a smaller touch target. Siteimprove will report:
For more information on this, go to Create an accessible list of links