Glass break + stp network loop, weird morning

Hi all - had a bit of a strange morning. I have a konnected pro board powered via POE, it’s been running great for a long time. It’s integrated with Hubitat. 2 weird things happened this morning.

  1. I have 4 glass break sensors wired in series. It’s been this way since my first non-pro board I bought back in 2018. My alert for glass breaks has never gone off, but it triggered at 5:45 this morning. Being that the sensors are wired in series, I don’t know which triggered it, but I can say the house was quiet as a mouse when it happened. Not sure how to troubleshoot or determine why?
  2. At 6:07am, my unifi router blocked the POE port of my konnected board stating “<port#> was disabled by STP to prevent a network loop. It will be automatically re-enabled when the loop is no longer detected.” Minutes later, it returned. Konnected has a static-assigned IP and I see that no other device shared this IP at any time.

Very confused as to what is going on in my house this morning!