Custom script with plugin database models

[skeptr]

Hello.

I am using netbox 2.11.12 and self-made plugin with some database models and a custom script which should use these models to do some changes in netbox objects.
To get these forms to render i used custom 'ObjectVar' class with from_field taken from DanSheps /
netbox_plugin_extensions.forms.fields.
Example:

class PluginObjectVar(ObjectVar):
    form_field = PluginDynamicModelChoiceField

class SiteAddressFixer(Script):

    class Meta:
        name = "Site actualize"

    site = ObjectVar(model=Site, required=True)
    kladr_region = PluginObjectVar(model=kladr_models.Region)
    kladr_district = PluginObjectVar(model=kladr_models.District)
    kladr_city = PluginObjectVar(model=kladr_models.City)
    kladr_street = PluginObjectVar(model=kladr_models.Street)

    def run(self, data, commit):
        ...

When i run the script i can not choose any item in drop down menu (items are not clickable):

In other templates (eg 'inc/search_panel.html') views with my filterset_form inherited just from utilities.forms.BootstrapMixin, django.forms.Form and fields from netbox_plugin_extensions works well for models from that plugin.

Am I getting or doing something wrong?