Email Notifications Stopped Working Properly

For the last few days, the email alerts I would normally get within a few seconds after opening my Schlage lock and door sensor connected to mt Vera have started being delayed by hours and then I get bunches or emails that seem like repeats of the same event.
It is not a general delay in mail to this account, because I get other email sent to that email account right away. Only my “unit notification” emails are messed up.

What could be causing this issue?

Same here. Past couple of days has been really hit or miss on notification delivery of both email and text. Hopefully the UI7 issue they resolved (hopefully) today eliminates this.