Map block breaks custom archive query since Maps 2.0.9

Symptoms

A Map block added to a custom WordPress archive that uses the “View” as source for markers will break the underlying query for the archive.

So, if you have a custom archive for a “Location” post type, for example, then the loop section will display standard WordPress Posts and not posts of the Location type.

The markers are correctly displayed on the map, however.

Workaround

Downgrade Maps to version 2.0.8 (available from the changelog for Maps on the downloads page of your account), or insert the map and markers via legacy shortcodes instead of using the Map block.