User.anonymousId() returns an object instead of an ID

[disaacson]

The anonymousId method of User

analytics-next/packages/browser/src/core/user/index.ts

Line 432 in 40745ff

anonymousId = (id?: ID): ID => {

has a return type of ID (type ID = string | null | undefined),
but is returning the following object instead

[disaacson]

It looks like the anonymousId is currently accessed via
user.anonymousId().event.id in that object.

[disaacson]

I tried it in a new incognito browser and the anonymousId() method is now returning a string. It looks like the behavior above is state dependent.
FWIW - I had previously tried to call alias. Perhaps that triggered the code path that resulted in the state above?