Connection field in dcim/interfaces/ behaves different from versions >= 3.3.x

[julianstolp]

NetBox version

v3.3.4

Python version

3.8

Steps to Reproduce

1. Set up Netbox version 3.3.4 and 3.2.9
2. Create a device1 with 1 interface
3. Create a device2 with 1 front and rear port
4. Connect interface from device1 with front port of device 2
5. Compare the view from /dcim/devices/device1_id/interfaces/

Expected Behavior

The last endpoint should be displayed in the Connection field, regardless of the type (Front, Rear, Interface). According to my understanding the representation is more correct in the versions <=3.3. I could not find any related changelog, issue or discussion on that topic.

Observed Behavior

In Netbox version 3.3 or higher the Connection field is empty.

[Omripresent]

I'm seeing a similar behavior running v3.3.4, while creating a new cable using a custom script

cable = Cable.objects.create(
            a_terminations=[term_a],
            b_terminations=[term_b],
            type=type,
            color=color,
            status=status,
            tenant=tenant,
        )

If I manually edit and save (without any changes) the connection field of term A is populated.
I think there's a problem with the cable path tracing system but I can't point to the exact issue just yet.

[kkthxbye-code]

@Omripresent - Your issue is not related to this issue.

Please see my reply here for info on how to properly use the internal API for creating cables.

[jeremystretch]

Marking this as a duplicate of #10460