First line indents?

I very much like this theme and installed it this morning:

https://www.georgehunka.com

One question, however — if you look through the first few pages, you’ll see that the first line of paragraphs is occasionally indented, often the first line of a post, while this isn’t true for other posts. I prefer that the first lines of all paragraphs NOT be indented — is there a fix for this?

Thanks, and all best,
George Hunka