View subscriptions can fire spurious events.

[epickrram]

1. A queue contains events of TYPE_A and TYPE_B, published by one or more publishers
2. A subscriber, SUB_1, subscribes to events of TYPE_A from the queue
3. SUB_1 receives the initial snapshot of TYPE_A events
4. A publisher writes an event of TYPE_B to the queue
5. SUB_1 receives a TYPE_A event notification