There is issue occurring when changing the font size to a small size, doing this distorts the font when the size is below size 18. It is unknown if this intended behavior for how fonts are resized. This issue does not appear to be a regression.
Versions Tested: Issue occurs in all versions tested
4.16.3 - CL: 3561208
4.17.2 - CL: 3658906
4.18.0 - CL: 3685441
Head over to the existingAnswerHub thread and let us know what's up.