Fullcalendar wrong position click and wrong selected day - fullcalendar

Question

I have a problem with my Angular app where I have implemented the fullcalendar. When I click on a date it selects the wrong one. It only happens on the left side and top of the date square. I attach screenshots with my pointer, the click I do it where you see the pointer.
My full calendar code:
`calendarVisible = true;
calendarOptions: CalendarOptions = {
headerToolbar: {
left: '',
center: 'title',
// right: 'refreshButton prev,next today'
right: 'refreshButton prev,next today dayGridMonth,timeGridWeek,timeGridDay,listWeek'
},
initialView: 'dayGridMonth',
contentHeight: 900,
//initialEvents: INITIAL_EVENTS, // alternatively, use the `events` setting to fetch from a feed
weekends: true,
editable: this.global.isFeatureActive(Features.updateActivity),
eventDisplay: 'block',
selectable: true,
selectMirror: true,
dayMaxEvents: false,
dayMaxEventRows: 3,
locale: itLocale,
themeSystem: 'bootstrap5',
customButtons: {
refreshButton: {
//text: 'Aggiorna',
icon: 'arrow-clockwise',
click: () => {
this.refreshEvents();
}
}
},
eventDrop: this.handleDropEvent.bind(this),
eventContent: this.customEventContentTest.bind(this),
events: (info, successCallback, failureCallback) => {
this.actService.GetCustomByRange(info.start, info.end).subscribe({
next: (res) => {
this.global.setLoad(true);
this.aeService.activitiesSub.next(res);
this.aeService.applyFilter();
//this.aeService.activitiesToEvents(res);
successCallback(this.aeService.eventsSub.getValue());
},
error: (err) => {
failureCallback(err)
},
complete: () => {
this.global.setLoad(false);
}
});
},
select: this.handleDateSelect.bind(this),
eventClick: this.handleEventClick.bind(this),
eventMouseEnter: this.handleEventMouseOver.bind(this),
eventsSet: this.handleEvents.bind(this),
eventDidMount: (info) => {
//console.log("eventDidMount",info.el);
this.customEventContent(info);
},
eventAdd: (arg) => { },
// {description: "Lecture", department: "BioChemistry"}
/* you can update a remote database when these fire:
eventAdd:
eventChange:
eventRemove:
*/
};`