Pin It button only showing up on small images, not large

See the following page:
https://www.debraprinzing.com/

The Pin It button appears on all the smaller inset images, but not on the big images that appear between paragraphs.

Also, at least some images that were supposed to have text wrapping around them were not. I solved this by adding:
.pibfi_pinterest {
display: block !important;
}
to our stylesheet, but I think this is a less than ideal solution.

The main issue though is the Pin It button not appearing on large images. Is there something I can do?

https://www.ads-software.com/plugins/pinterest-pin-it-button-for-images/