Post grid not responsive | WordPress.org

Hi, thanks for letting us know. The issue will be resolved in the following Widgets Bundle update. For now, you can try the following inserted at Appearance > Custom CSS or Customize > Additional CSS or the Custom CSS location of your choosing:

@media (max-width: 780px) {
	.sow-blog-layout-grid .sow-blog-posts {
		grid-template-columns: repeat(1, 1fr) !important;
	}
}

That’s sorted it! Thank you.