The Draw interaction seems to be broken in the current dev release. When I load a map with Draw enabled, I get the following error in the console:

********************* Starting building apios_map *********************
openlayers.debug.js?nmjnr0:12 Building map...
openlayers.debug.js?nmjnr0:20 Building sources...
openlayers.debug.js?nmjnr0:29 Building controls...
openlayers.debug.js?nmjnr0:38 Building interactions...
openlayers.debug.js?nmjnr0:74 Loading interactions openlayers_interaction_draw...
openlayers.debug.js?nmjnr0:75 Object data
openlayers.debug.js?nmjnr0:76 Object {mn: "openlayers_interaction_draw", fs: "openlayers.interaction.internal.draw"}
openlayers.console.js?nmjnr0:27 Cannot set property 'features' of undefined
openlayers.console.js?nmjnr0:27 TypeError: Cannot set property 'features' of undefined
    at Object.Drupal.openlayers.pluginManager.register.init (http://local.apiosinstitute.org/sites/all/modules/contrib/openlayers/src/Openlayers/Interaction/Draw/js/draw.js?nmjnr0:24:23)
    
...

I am using Geofield 7.x-2.3 with Openlayers 7.x-3.x.