Hi Jose,
Thanks for the update.
We checked the shared details and we suspect that you have block the particular time for a day in month view. We have to let you know that if we block a particular time for a particular day, we drag and drop the event apart from that particular timing on the same day. For example, if we block the time from 10 AM to 11 AM today, we can drag and drop the event which is having 3 PM to 4 PM. So we suggest you please enable the IsAllDay field for all block events to overcome this issue.
Regards,
Vengatesh