I have been out of town since last Saturday (7/16) and just happened to notice this morning that no alerts were being sent out from WxNotify! The issue ended up being a mismatch of versions between a Javascript library (socket.io) between Laravel Echo Server, and client. This mismatch began last week when I did some deployments to roll out some new features. (more on that soon)
At any rate, the alerting issue has now been resolved and alerts are once again going out. Many apologies!!