You'll notice
Useful2 Signal1
Streaming updates nobody is reading are dropped instead of queueing up.
What's wrong with this entry?
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What
Partial stream_event updates are now dropped at the point they are queued if the primary output sink is off and no listener is attached, so they no longer pile up in a queue nothing will drain.
Evidence
e.type === "stream_event" && !De() && this.enqueueListener === null
Strings lifted out of the shipped bundle, so the claim above can be checked against them.