It seems notifications on new reputation gained is broken again.
Notifications on comments are not affected. It seems to happen quite often nowadays. Is there a problem with it? Can it be fixed please?
Update: fix is live, queue is draining from 170k entries now. All should be well in under 5 minutes.
There was a new change to this system this morning that added a new reputation type for suggested edit overrides...but the aggregator, upon seeing the first one, promptly threw a fit (it hadn't been build to see this new enum type yet).
A fix is building out now which will drain the redis queue as soon as it accepts the new type as valid and moves along. A current top-level view of the aggregator queue (we rack up items quickly):