The Dato main interface modifies its root font size (14.4px, 15px, 16px) at different breakpoints, however plugin iframes are always set to 16px. This causes plugin UI to often appear out of sync (larger) compared to similar elements in the native UI. This cannot be robustly addressed within the plugin.
The SDK should set the prevailing native interface root font size on the iframe documentElement, and update it with breakpoints.