sticky-question-mark, go back to Membrane.EventProtocol module for more information.
Specifies whether event is sent right away (not sticky), or it is 'pushed' by the next sent buffer (sticky). Defaults to false (not sticky).
Returning a sticky event from a callback stores it in a queue. When the next
buffer is to be sent, all events from the queue are sent before it. An example
can be the