Wrong value types on custom fields

[exiz01]

NetBox version

v2.11.0

Python version

3.6

Steps to Reproduce

1. Create a custom field for a dcim > device type.
2. Select a value type as an integer.
3. Create a new device type through the API and set a string value equal to '1234' for the new custom field in the same request.

Expected Behavior

The new device type should have an integer value on the custom field.
If a device type is created through the GUI this works fine.

Observed Behavior

The new device type has a string value on the custom field