I see the issue in your screenshot but checking out the preview site it all looks good now. Did you change something?
Something that does stand out is the child structure of the parent div for those 3 elements (image, headline, text block).
You’re switching between block and inline block for those. Maybe some uncertainty is added there.
You can always nest another grid. Make it 2 column, 1 row.
The first column is your image, the second is your headline & text block. The second column could contain block elements so they stack vertically.
You could more easily control spacing between the two grid items. Just a suggestion…
Hope that helps!
(Nice looking site by the way!)