Have recently started to use this plugin on one website, and I have some issues. Of some reason it removes the location when I open an event to edit it.
Since I use swedish version, I guess that field names may be useful; Venue and address.
Sometimes Venue is marked red, and sometimes green. But that doesn't matter, it still removes it next time someone tries to edit.
As long as noone has tried to edit, the event seems to store venue and address without any issues. But it's quite frustrating when it's removed all the time.