If you happen to have made your account directly from the account page, rather than having been prompted through the flow, it doesn't direct you to the screen to help you find your electorates. It should.
If you have registered an account but not specified electorates, the 'My MPs' button is enabled, though it shouldn't be.
Expected behaviour: discuss. It's not clear we want to keep prompting someone to find their electorates every time, if they have declined to do so. Registration should have states, so everyone should have senators.
In some edge cases, the MPsKnown flags are wrong.