Footer Content Becomes Smaller After 3 lines of text

I have noticed that, regardless of the theme used, the plugin "Footer Content" (Appearance --> Footer Content) becomes smaller after 3 lines of text. That is, the text in the "Footer" becomes smaller after 3 lines of text (goes from like a size 14 to a size 10). No matter what "font class" is inserted in the footer, it still stays this way. How to fix? Is there a CSS class that I should be using. If so, please provide