iCal Export 30 Event Limit?

Searching online, I don’t see a solution and possibly this could be a bug. I apologize if I have duplicated a question, I was unable to find a solution on my own.

I run a summer concert season with over 50 events in the summer. A great tool (last year) was to have my visitors run a list of all the 2016 events and then export the iCal link and import it directly into their calendars. This worked great last year, however this year, I realized that the listings stopped after 30 events. I went back to 2016 and tried to export them, to which I found that they now also only export 30 events in total. Is this a limit of the free vs pro calendar, or have I discovered a bug?

Thanks!