Please fix this bug on the new update

Hi, i think this is a bug on Urna Product Tabs widget, when I change the heading from H3 to H2, it has this bug.

This is the heading of the addon

Ya, i know but the 3 tabs Newest, Best selling, On Sale display wrong when I change the headline from H3 to H2, you can see in the picture 2 i posted

That isn’t the heading of the addon so it won’t change.