Thanks for providing the link.
I can see what you mean on mobile. The face in the image is covered on mobile.
The pattern is designed so that the text box overlaps the image on the left and then on mobile the overlap moves to be lower and not cover as much of the left side of the image, but a bit more of the lower half of the image.
It’s difficult to get it exactly right for all situations as we don’t know beforehand what content & images will be used on someone’s website.
If I have understood correctly, you would like to have no overlap whatsoever on mobile?
If so, please copy & paste this custom CSS at Appearance > Editor > Styles > Additional CSS:
@media (max-width: 599px) {
.wp-block-query.is-style-offset .is-style-offset-wrap {
display: block;
}
}
The CSS code above will change the block style from grid
to block
and remove the overlap/offset on mobile only.