I identified a glitch in the Scheduler component when the “All-day” option is checked. Here are the steps to reproduce the bug:

1. Click on any cell to create an event.
2. Add an event name and set the start and end dates to be the same.
3. Check the “All-day” option.
4. Save the event.
5. Attempt to resize the same event.
6. If you resize it from the right side, it moves to 2 cells instead of 1. Resizing from the left side works correctly. The right-side resize action has an issue

NOTE: please test the scenario at this link: https://www.htmlelements.com/angular/demos/scheduler/grouping-n-vertical-resources/ using the TimelineMonth view.