Mashup shortcode parsing

I use mashup shortcode with marker clustering. Clustering parameters were parsed from string (“maxZoom=15&gridSize=30”). It worked fine untill some time. Now it throws an error.

[googlemapsmashup query=”post_type=regions&nopaging=true” map_type_id=”roadmap” width=600 height=600 marker_clusterer_options=”maxZoom=15&gridSize=30″]

I’d like continue using such shortcode.

https://ww.wp.xz.cn/plugins/pronamic-google-maps/