We have run into a very specific situation in which an event is not displayed when groupConcurrentEvents has been enabled in the scheduler. There are 3 events in the group, and a single event on Jan 17th. What is shown is a group of two events and what looks like a blank group to the right of it:
When the group is expanded we see the two events and the single event but still missing the third event in of the group:
When the groupConcurrentEvents is set to false we se all the events correctly (missing event highlighted) :
I have also attached xht file of the complete array list of events. The event id of the missing event is 588088
The above result was generated using daypilot-all-min.js version 2025.1.6333
Hoping you can help with a fix or suggestion for a work-around.