Custom field's default value not respected when using bulk import CSV

[diondohmen]

Deployment Type

Self-hosted

NetBox Version

v4.0.1

Python Version

3.12

Steps to Reproduce

P.S.
Tested this also with the current public demo instance of Netbox giving the same result.

1. Add a new custom field with the following specs:

• Object-type: DCIM > Device
• Name: 'test_default'
• Type: Boolean
• Required: False
• Default: true

3. Use 'Device Bulk Import' feature together with the following CSV file.
   The CSV doesn't mention the cf_test_default column/value so you would expect Netbox to enter the default value

public_dev_netbox_devices_import_ttt.csv

5. After submitting you can see the device has been added but the custom field 'test_default' is empty.
   

Expected Behavior

The custom field's value should be 'True' like in the following screen:

Observed Behavior

The custom field's value is empty/null using the Device Bulk Import.
When adding a device manually, the dropdown box is pre-filled with the correct default value of True