events.update updates the whole calendar and not the only event, causing flickering.

      const id = pickedEvent !== undefined ? pickedEvent.e.data.id : "-1";
        let event = calendarRef.current!.control.events.find(id);
        // console.log("E' QUI CHE DIVENTA 1");

        if (event !== null) {
          const clientId = event?.data.tag.client_id;
          // console.log("[DAYPILOT] UPDATE");

          // console.log("NOTE", note);

          calendarRef.current!.control.events.update({
            id: id,

            text: pickedService[0].service.id_service,
            start: pickedService[0].date!["start"],
            end: pickedService[0].date!["end"],
            resource: pickedService[0].resource.id,
            cssClass: "draft_event",
            barHidden: true,
            tag: {
              marker: pickedService[0].service.ec_color_light,
              client:
                (watchFields.name ?? "Passaggio ") +
                " " +
                (watchFields.surname ?? gender),
              service: pickedService[0].service.name,
              writtenNote: note,
              note: note !== undefined,
            },
          });

Why this code causes flickering in all the calendar when called? I would like only the event to be updated, but everything is redrawn.