Map zoom changing on page load

Hi,
We have the plugin working on this page
https://thetastermagazine.com/get-free-magazines/

As you can see, when the page first loads we have the zoom level set to show all of the U.K. but it quickly zooms out to show most of Europe.

The zoom levels in the settings are both set to 5 so not sure why it’s zooming out.

Can anyone help?

Thanks

https://www.ads-software.com/plugins/store-locator/