Some zoom level is inaccurate for the tree cluster icons

For this case, https://map.treetracker.org/?userid=3350&bounds=-73.65225791931154,18.25641487184136,-73.52866172790529,18.28803799525966
when zoom in, the cluster number gets lost,

zoomed in:

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Some hints:

- Please read our [readme](https://github.com/Greenstand/treetracker-web-map-client#treetracker-web) for more information/guide/tutorial.
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- More issues in this project: https://github.com/orgs/Greenstand/projects/26

Reproduce the linked map case and compare the tree cluster icons at several zoom levels. Start by tracing the frontend map and cluster-icon behavior; done means the cluster count remains visible and accurate while zooming in for this case and similar map views.

Written by the indexing model from the issue text.