Quick summary

The map block breaks on Simple sites when adding more than 37 markers.

Map block with 37 markers:

Map block with 38 markers:

Steps to reproduce

1. Add a map block to any page on a simple site
2. Add 38 markers to the map
3. View the bulleted list of markers on the frontend

What you expected to happen

The map should display a map with all the markers.

What actually happened

After adding the 38th marker to the map, the frontend displays a bulleted list of markers.

Impact

Some (< 50%)

Available workarounds?

No but the platform is still usable

If the above answer is "Yes...", outline the workaround.

If a user needs to add more than 37 markers to the map, they will need to use multiple map blocks. I don't think users will do this, so I'm marking this bug as no workaround

I ran into this issue when building a DIFM express site for a customer. We chose to not include multiple maps and instead listed the locations on the page with links to Google maps for each location.

Platform (Simple and/or Atomic)

Simple

Logs or notes

I tested the map on Assembler and Twenty Twenty-Four on simple sites, as well as testing both themes on an atomic site.
I was able to add 43 markers to the map on the atomic site without problem each time.
The issue occurred on both themes on the simple sites.