Hi Dan, thanks for your reply.
Unfortunatly, that is not the issue. I'm calling commandCallBack() right after the events.add() to notify the server side and update my database.
I did a debug and BeforeEventRender is getting called and the event is processed, but still the same issue.
As aditional, after adding the event, when I go over the event to popup the Bubble, I get a JavaScript error as described bellow
WebResource.axd?d=xiEDXLHsAVD5SbEbC2X215B-UVPFtMV4HW4m8VvQ6PXZvAu3QQRYq-y0PgAnCvI3AABREPfhg9SSS7xZYy-Dng4zEEaI5JNbNz4MTzFVEJFg8FDKEvP80PX_XaleU03U0&t=637029792000000000:2 Uncaught TypeError: Cannot set property 'innerHTML' of undefined
at DayPilot.Scheduler.$cY (WebResource.axd?d=xiEDXLHsAVD5SbEbC2X215B-UVPFtMV4HW4m8VvQ6PXZvAu3QQRYq-y0PgAnCvI3AABREPfhg9SSS7xZYy-Dng4zEEaI5JNbNz4MTzFVEJFg8FDKEvP80PX_XaleU03U0&t=637029792000000000:2)
at DayPilot.Scheduler.clearSelection (WebResource.axd?d=xiEDXLHsAVD5SbEbC2X215B-UVPFtMV4HW4m8VvQ6PXZvAu3QQRYq-y0PgAnCvI3AABREPfhg9SSS7xZYy-Dng4zEEaI5JNbNz4MTzFVEJFg8FDKEvP80PX_XaleU03U0&t=637029792000000000:2)
at DayPilot.Scheduler.$ij (WebResource.axd?d=xiEDXLHsAVD5SbEbC2X215B-UVPFtMV4HW4m8VvQ6PXZvAu3QQRYq-y0PgAnCvI3AABREPfhg9SSS7xZYy-Dng4zEEaI5JNbNz4MTzFVEJFg8FDKEvP80PX_XaleU03U0&t=637029792000000000:2)
at DayPilot.Scheduler.$cM (WebResource.axd?d=xiEDXLHsAVD5SbEbC2X215B-UVPFtMV4HW4m8VvQ6PXZvAu3QQRYq-y0PgAnCvI3AABREPfhg9SSS7xZYy-Dng4zEEaI5JNbNz4MTzFVEJFg8FDKEvP80PX_XaleU03U0&t=637029792000000000:2)
at WebResource.axd?d=xiEDXLHsAVD5SbEbC2X215B-UVPFtMV4HW4m8VvQ6PXZvAu3QQRYq-y0PgAnCvI3AABREPfhg9SSS7xZYy-Dng4zEEaI5JNbNz4MTzFVEJFg8FDKEvP80PX_XaleU03U0&t=637029792000000000:2