I’m also having this issue. I initially set zoom to 17 (closer), but then changed it to 13 (further out). I have tried deleting the field and creating a new one with a different name, but it still stays zoomed in too close.
Not sure if it is stuck on my initial closer zoom setting or is just stuck on a close zoom.
On the backend (when editing the page) the preview map is zoomed properly according to my zoom setting.
It is the map that is rendered on the actual webpage that is zoomed in too closely.