Hi Mohammad Fadaeian
Greetings from Syncfusion Support,
We have reviewed and validated your query.
Your investigation was correct. When the event is dropped, the scheduler will refresh, and this is the intended behaviour.
After drop:
- Scheduler updates the event’s start/end/resource values
- Validates the event against rules (work hours, overlaps, constraints)
- Recalculates appointment collections for the current view
- Re-renders the appointment layer
This process triggers a refresh to ensure consistency across the UI. This is why you see a short redraw/glitch.
Regards,
Vijayakumar R