Cannot display more than one map

Hello,

After working flawlessly for a year or so, some changes (probably introduced in recent versions) are now breaking my contact page (getting the dreadful “Whoops, looks like something went wrong.”)

I’ve been following recent resolutions, but even with the latest patch I cannot display anymore multiple maps on a page. If I keep only one map, no problem whatsoever. At 2 maps, the page crashes and I see in my PHP logs:

ErrorException: Constant DEFAULT_MAP_WIDTH already defined in /var/www/example.com/wordpress/wp-content/plugins/osm/osm_map_v3/osm-sc-osm_map_v3.php:18