form.save() does not save instance to DB, but instance.save() does

Using Django Mystery Errors
1

I have a creation-form for “event” like


class EventCreationForm(forms.ModelForm):

    guests_emails = forms.CharField(
        required=False,
        widget=forms.HiddenInput
        (),
    )
    hosting_date = forms.DateTimeField(input_formats=["%d-%m-%Y %H:%M"], widget=forms.DateTimeInput(format="%d-%m-%Y %H:%M", attrs={"placeholder": "dd-mm-yyyy T:M"}))

    class Meta:
        model = BaseEvent
        fields = ["description", "title", "hosting_date", "place", "cover_image"]


    def clean_guests_emails(self):
        emails = self.cleaned_data["guests_emails"] or "[]"
        emails = json.loads(emails)
        for email in emails:
            validate_email(email)
        return emails

and a view for updating an instance

@login_required
def edit_event(request, pk):
    event = get_object_or_404(BaseEvent, pk=pk)

    # Ensure only hosts can edit the event
    if request.user not in event.hosts.all():
        return redirect('event_detail', pk=event.pk)  # Redirect if user is not a host

    if request.method == 'POST':
        form = EventCreationForm(request.POST, instance=event)
        if form.is_valid():
            form.save()
            return redirect('event_detail', pk=event.pk)  # Redirect to event detail page
    else:
        form = EventCreationForm(instance=event)

    return render(request, 'events/edit_event.html', {'form': form, 'event': event})

The form.save() is being called but for some reason the instance is not updated.
If I do it on the instance i.e

#form.save()
instance = form.save(commit=False) 
instance.save()

then it works fine.

I’m not getting any error, the form contains the changes etc., thus I can’t see why the form.save() won’t work (especially when using it to create an instance and then save that works).

Note, I’m not overwriting the save() method anywhere.

Any ideas

2

I’ll assume for now that this is in a development environment using runserver.

You can confirm that no errors appear in the console?

The sequence of requests shown in the console are the same both ways?