Caching error when swapping A/Z circuit terminations

[cybarox]

NetBox version

v2.11.2

Python version

3.8

Steps to Reproduce

Test: https://demo.netbox.dev/circuits/circuits/35/

1. Create new circuit with new circuit id
2. add Z termination to a site
3. click swap on z termination

Expected Behavior

A and Z Terminations are swapped

Observed Behavior

An Error appears: No terminations have been defined for circuit test2.

[jeremystretch]

Yet another caching bug...