When you create the event you enter the value in Eastern Standard Time (EST). It is saved to the database as UTC but displays correctly on the calendar. The problem is when you edit the event it show the UTC times in the edit event dialog [see screenshot] and when saved it appears to assume that the time is again eastern so it causes it to move.
The item is saved in the database with UTC Start, Stop field the StartTimeZone and EndTimeZone are both set to "Etc/UTC". [see screenshot]
The Timezone on the scheduler set up is set to "America/New_York"
I am using Version 2019.1.220 of KendoUI for Asp.Net MVC