I have calendar instance with drag & drop activated via "editable-events" prop as well as "events-on-month-view" prop set to "short". If there are multiple single day events present on one day which is not contained in the current month but still displayed (e.g. in Novemeber view the last days of October are displayed and there are multiple events on October 31st) and the user drags and drops an event to a day of the current month, the remaining events of that day just disappear.
I have calendar instance with drag & drop activated via "editable-events" prop as well as "events-on-month-view" prop set to "short". If there are multiple single day events present on one day which is not contained in the current month but still displayed (e.g. in Novemeber view the last days of October are displayed and there are multiple events on October 31st) and the user drags and drops an event to a day of the current month, the remaining events of that day just disappear.