So, I ran across this issue in the past but the Add+ did not appear for any of the calendar dates. This is a different issue. The Add+ does appear for all dates but on a certain date range the Add+ appears but when you select it - nothing happens. Example. It will appear and the form will come up for dates from 1st to 15th of October. But for 16th to 20th of October the Add+ appears in the calendar but when I click on the it the form does not open.
Has anyone experienced this issue? I thought its pretty odd when it works perfectly fine for the other dates on the calendar. FYI. I am using Windows 10/Edge.