I am the web developer for the site which has a Pro version of your plugin (Salem.org).
Recurring events are not showing up for the month of October, 2017. I’ve definitely entered the data correctly in the fields (see screenshots).
The events occur using the “Once” attribute in the backend. All of the months before October show recurring events. All months after (and including October) do not show recurring events.
The recurring event only shows up once per instance.
Screenshot – values entered:

Screenshot – “See All” shows “unspecified date” on hover state:

Screenshot – recurring event only shows up once in list and calendar views:

What could be the issue here?