"Transfer if no active subscriptions" still transfers active subscription when an anonymous user id restores purchase

I’m using “Transfer if no active subscriptions”, however, I’ve noticed if an anonymous user id calls `restorePurchase`, the anonymous can always transfer the subscriptions, no matter the subscription is active or not.

Here’s the complete flow where the transfer happens even if there are active subscriptions:

1. On device 1, user logs in and purchase subscription
2. On device 2 with the same Google Play account signed in, anonymous user is not logged in, but taps the “restore purchase” button
3. The subscription is now transferred to anonymous user 

However, in the following flow the “Transfer if no active subscriptions” works as expected:

1. On device 1, user A logs in and purchase subscription
2. On device 2 with the same Google Play account signed in, user B logs in and tap “restore purchase” button
3. The restore failed due to `ReceiptAlreadyInUseError`

In case anyone’s curious, the reason why we have a `restorePurchase` button even if user is signed out is that we support consumables.