Title of blog post is blank for Pinterest

When clicking on the Pinterest share button, the text that is shared with the image is from the image’s Alt Text field. Shouldn’t the text be taken from the blog post title? I have used other social plugins where the Pinterest Share uses the blog post title. The reason I discovered this is because I had an image with a filename of ‘unnamed’ and so the alt text was ‘unnamed’. When the image was shared, the text below the image was ‘unnamed’. So if I want to use this plugin, I need to go back and make sure all of my images have good ‘alt text’ description.
https://www.organizingmaniacs.com/meet-minimalist-matt-stoltz-with-biking4baseball/

https://www.ads-software.com/plugins/accesspress-social-share/