Not getting new missions for the event

I have not been getting new missions for the event the past two days. I've been doing them regularly and had been receiving new ones every evening. I have maybe 8 or 10 completed missions in the list right now. Do I need to clear these out before I can accept new ones maybe?

The only thing I have done differently in that time frame is update my PBE client and play on that for a couple hours.

Is there an event mechanic I'm just not understanding?