Marker popup text with = or ; breaks map display

Setup

• Maps version: 7.20.1
• MW version: 1.31
• PHP version: 7.3
• SMW version (if applicable): 3.1.6

Issue

When displaying a map with markers, the map fails if the popup text of one of the markers contains either an equal-sign (=) or semicolon(;). There may be other forbidden characters such as ~.

This may have been fixed already in the latest version but I did not find this in the release notes.

Steps to reproduce the observation (recommendation is to use the sandbox):

Works:
{{#display_map: Amsterdam~The city Amsterdam~Amsterdam is the capital of The Netherlands~Green-marker.png }}

Fails:
{{#display_map: Amsterdam~The city Amsterdam~Amsterdam = the capital of The Netherlands~Green-marker.png }}

Resolution

Allow to use quotes to avoid misinterpreting special characters.
{{#display_map: Amsterdam~The city Amsterdam~"Amsterdam = the capital of The Netherlands"~Green-marker.png }}

Reproduce the issue on the linked sandbox using the working and failing #display_map examples, then trace how marker popup text is parsed. Verify handling of quoted text containing = and ;, including the reported examples, and confirm that the map renders successfully without breaking existing unquoted text.