Two Interdependent select2 fields reset each other? #229

Goal
I want to make filters for a table that inter depend on each other so that it doesn't matter which filter I choose to start with first.

Problem
The problem comes when I set the filters to depend on each other in the dependent_fields like so:
https://django-select2.readthedocs.io/en/latest/extra.html#interdependent-select2
When I select the first field, everything is okay, but when I click a new value for the second field, it resets (clears) the first field. The same happens when I try the other way around.
Am I missing something?

Cheers!

Code Snippet

class Test1Widget(s2forms.ModelSelect2Widget):
    search_fields = [
        "code__icontains"
    ]
    dependent_fields = {
        "test2": "db__test2",
    }

class Test2Widget(s2forms.ModelSelect2Widget):
    search_fields = [
        "id__icontains"
    ]
    dependent_fields={
        "test1": "db__test1",
    }
test1 = ModelChoiceFilter(queryset=test1.objects.all(), widget=Test1Widget)
test2 = ModelChoiceFilter(queryset=test2.objects.all(), widget=Test2Widget)