ChainedManytoManyField not working with inline forms

[raftorres]

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All versions of django-smart-selects prior to version 1.2.8 are vulnerable to an XSS attack as detailed in issue 171. As a result, all previous versions have been removed from PyPI to prevent users from installing insecure versions. All users are urged to upgrade as soon as possible.

Checklist

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• This issue is not about installing previous versions of django-smart-selects older than 1.2.8. I understand that previous versions are insecure and will not receive any support whatsoever.
• I have verified that that issue exists against the master branch of django-smart-selects.
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• I have debugged the issue to the smart_selects app.
• I have reduced the issue to the simplest possible case.
• I have included all relevant sections of models.py, forms.py, and views.py with problems.
• I have used GitHub Flavored Markdown to style all of my posted code.

Steps to reproduce

1. Git clone the master to a app directory
2. Run migrations and load data json
3. Started test_app and use the portal admin
4. Try add new membership inside groups

Actual behavior

ChainedManytoManyField not working with inline forms

Expected behavior

Tested with Python 3.8 / Django 3.2 / django-smarts-selects last version 1.5.9

Code in models.py

# Test many to many with inlines and formsets
class Person(models.Model):
    name = models.CharField(max_length=128)

    def __str__(self):
        return "%s" % self.name


class Group(models.Model):
    name = models.CharField(max_length=128)
    members = models.ManyToManyField(Person, through="Membership")

    def __str__(self):
        return "%s" % self.name


class Talent(models.Model):
    name = models.CharField(max_length=64)
    persons = models.ManyToManyField(Person, blank=True)

    def __str__(self):
        return "%s" % self.name


class Membership(models.Model):
    person = models.ForeignKey(Person, on_delete=models.CASCADE)
    group = models.ForeignKey(Group, on_delete=models.CASCADE)
    talents = ChainedManyToManyField(
        Talent, chained_field="person", chained_model_field="persons", horizontal=True
    )
    date_joined = models.DateField()

Code admin.py

class MembershipInline(admin.TabularInline):
    model = Membership
    extra = 1


class PersonAdmin(admin.ModelAdmin):
    list_display = ("name",)


class GroupAdmin(admin.ModelAdmin):
    inlines = (MembershipInline,)


class TalentAdmin(admin.ModelAdmin):
    list_display = ("name",)

When I try to add a new membership, it does not load relationship data within inline forms when selecting person

ChainedForeingKey works, but ChainedManytoManyField fails. The console and network do not throw any errors.

Please, any solution?