Wrong cluster

Hello, when he used the [cluster] tag he did it wrong, but not on the entire map.

I want to do it because of proximity (lat,long), in some cities it does well, but in others it doesn’t.

When they are two nearby cities, it groups it, but in the same city with several markers it does not work.

And I don’t understand what the error is.

<?php echo do_shortcode('[leaflet-map height="500" lat=-49.1380049290461 lng=-66.44531250000001 zoom=5 fitbounds zoomcontrol !detect-retina]') ?>

<?php $shortcode = '[leaflet-marker iconUrl="..." iconSize="25,41" iconAnchor="12.5,45" lat='...' lng='...']City Name[/leaflet-marker]' ?>

<?php echo do_shortcode('[cluster]') ?>

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