We are having issues with the Marketing blocks as the breakpoints are not configured well. When a grid that is 4 columns wide, such as your demo page, when the screen width drops to under 930 px some content is cut off, it's not until the width drops to 768px that the "flex" grid changes the column width from 23% to 100%. As this is supposed to be a responsive grid, why does the width not switch to ~50% per column at say 1000px width? If you have a read more button, it is even more awkward to use the marketing blocks on portable devices.
Can the Marketing block please be updated to include custom breakpoints? Maybe an option to hide on certain screen resolutions?
Attached image shows the block that says the template is fully responsive, and beside that the block that fails the responsiveness test.