Not receiving notifications for some replies

[sam (Sam Saffron)]

I saw this report earlier as well:

Severe Email Issue since last update a couple days ago - 3.4.0.beta4-dev

It feels like since I last updated discourse a few days back, that reply email is no longer working, it is not being received and thus not updating the topic, and sent email for watched categories is also misbehaving, only sending 5 of 65. Does anyone else have recent email issues?

Could be related, team is investigating.