Class / style differences in Calendar navigation.

I noticed a difference between the default styling of the navigation and the footer, when enabled via shortcode. They have different weights, fonts and font sizes (body vs H4). Although it is fixable with manual css, it seems like these should be the same out of the box.

Currently using following css:
font-size:19px !important;
font-weight: bold !important;
font-family: 'Open Sans', Arial, Helvetica, sans-serif !important;

p.s. Not sure if this is the correct place to post potential bugs.