Possibly intermitent failure in `BanPropagationProtectionTest`

[Gnuxie]

 [2024-09-19T22:16:32Z INFO  mx_tester::exec] run:   1) Ban propagation test
[2024-09-19T22:16:32Z INFO  mx_tester::exec] run:        Should prompt to add bans to a policy list, then add the ban:
[2024-09-19T22:16:32Z INFO  mx_tester::exec] run:      Error: expect(received).toBe(expected) // Object.is equality
[2024-09-19T22:16:32Z INFO  mx_tester::exec] run: 
[2024-09-19T22:16:32Z INFO  mx_tester::exec] run: Expected: 1
[2024-09-19T22:16:32Z INFO  mx_tester::exec] run: Received: 0
[2024-09-19T22:16:32Z INFO  mx_tester::exec] run:       at Context.<anonymous> (test/integration/banPropagationTest.ts:125:28)

Spotted this, CI is being weird generally atm but this looks genuine.

#568