pfSense

When my UPS (monitored with NUT) and one of my WAN (PPPoE) both send email notifications close to each other, it starts an email notification flood that end only with a reboot of the machine itself.
I'm receiving the same alerts over and over, every 10s or so.

In this thread there are some tests I took https://forum.netgate.com/topic/172123/pfsense-email-flood-issue which included checking the file notices_lastmsg.txt. That didn't update unless something new happened (normal behaviour I guess), only then it changed with the new notification, and the emails now contains also the new lines.

This is how I was able to reproduce the problem:

• I unplugged ups and 5 to 10s later unplugged wan2 and the email started flooding.
  First email I received is from the UPS, followed by the wan2 down:
  
  
  The file notices_lastmsg.txt is updated with:
  

  MONITOR: WAN2_PPPOE has packet loss, omitting from routing group WAN_FAILOVER
  

  
  The following minutes the same last email is getting repeated every 10 sec or so, here are the next 3:
  
  During the flood, the file notices_lastmsg.txt didn't change unless something new happened (so did the email notifications), only then it changed with the new notification, like at 7:12, where I plugged back in the wan2:
  
  Now the emails are being sent also with the new notifications, they are adding up.
  Afterwards I rebooted and I recevied the last email:
  
  This is the content of notices_lastmsg.txt now:
  

  7:09:43 MONITOR: WAN2_PPPOE has packet loss, omitting from routing group WAN_FAILOVER
  142.250.184.99|xxx.xxx.xxx.xxx|WAN2_PPPOE|10.029ms|1.699ms|24%|down|highloss
  7:12:47 MONITOR: WAN2_PPPOE is available now, adding to routing group WAN_FAILOVER
  142.250.184.99|xxx.xxx.xxx.xxx|WAN2_PPPOE|11.602ms|0.092ms|0.0%|online|none
  7:12:48 DynDNS updated IP Address on WAN2 (pppoe0) to xxx.xxx.xxx.xxx
  7:14:01 pfSense is rebooting now.
  7:15:18 Bootup complete
  

The ups came back online at 7:12:52, I've got only one email relative to it, in the middle of the other wan2 ones: