Editing Product Description, but when living it on the product page the formatting is incorrect

[dfmkt20]

Editing Product Description, but the formatting is a bit off. I can’t seem to find what’s wrong.

When I live it the font size is different (Highlighted yellow), inconsistent spacing between paragraphs (Highlighted Green)

What’s wrong with the product description editor, or is it a theme problem?

Link to page: https://comvita.com.ph/products/manuka-honey-umf-5-250-g

[DivinityWebS]

Some unnecessary tag and margin property of css is affected.
I make it proper, see screenshot