Map crashes Special:BrowseData when many printouts are required

[krabina]

The same query here:
https://fina.knowledge.wiki/Special:BrowseData/Correspondence
results in a blank page when I add one more printout: I it seems more than four are not possible. As you can see from the table below, this only happens in the map result format.

|display parameters=?Coordinates;?Author;?Recipient;?Associated persons;format=map;caption=Map

Seems to be a JS issue:

Is is a performance problem. If I try the same with a regular query, I get
Unstrip size limit exceeded (5,000,000), see ProfessionalWiki/Maps#565
At least SD should catch the error instead of crashing

TODO: investigate possibility to use marker-cluster, e.g. https://developers.google.com/maps/documentation/javascript/marker-clustering
example: https://www.memento.wien/map/