[Bug] Oversized clickbox on custom marker cluster in example

[dnishiyama]

Description

When following the example, the clickbox for each cluster is oversized just above the marker. It seems that this is related to the anchor being in the middle.

I haven't found a way to resolve this. Does anyone have an idea? Thank you. This repo has been phenomenal.

Steps to Reproduce

The easiest way to replicate is to go to the example and hover your cursor slightly above any cluster
https://visgl.github.io/react-google-maps/examples/custom-marker-clustering

Environment

• Library version: v1.5.2
• Google maps version: weekly
• Browser and Version: Chrome 133.0.6943.142
• OS: Mac OSX

Logs