Design System Display Logic Variant changing size

I am likely overlooking something stupid here, so be kind…
Using NLX with PostgreSQL
In the design system, I have a child under field that inherits everything except for the background color.
On the form, I have a field display logic style variant pointing to the design system child.
The result is that it changes the background color correctly, but it also changes the font size, resulting in a different height.
Please see attached screenshots.



Any ideas what I am doing wrong?
Thank you in advance.