MultiselectField is not working (with xlsx format)

[Natgho]

Describe the bug
In our Django project, we have a model with Multiselectfield, when we import an export from this model, we see that these fields are not loaded.
https://pypi.org/project/django-multiselectfield/

To Reproduce

1. Create a model with a MultiSelectField. (for example:

class SampleStudent:
    name= models.CharField(max_length=128, null=True, blank=True)
    countries = MultiSelectField(
        choices=COUNTRY_CODE_CHOICES,
        null=True,
        blank=True
    )

2. Generate a few random rows.
3. export as xlsx
4. try to import related file

Versions (please complete the following information):

• Django Import Export: 4.2.0
• Python 3.11
• Django 4.2.13

Expected behavior
What should happen is that MultiSelectField should be exported correctly and imported correctly.

[matthewhegarty]

Thanks for raising - if you can create steps to reproduce in a branch using the example app, that would help us to investigate.

[matthewhegarty]

Closed due to inactivity. Feel free to re-open if you can add steps to reproduce.