Run up the server again just now in case they had gone but still seeing the same 3339 stops. Again not sure when this started and if its been there a while.
Not seeing the message on the TFL site, eg i get it for:
stopId:74161 atco:490011157E2 state:0 messageType:0 priority:3 text:Test message expiretime:1725145320000
But the following appears fine:
I note the the expiry time is Sat Aug 31 2024 and that picking out an example at random I can see that this only occurs when the first parameter is 2 and these look like status messages for the Countdown displays rather than bus departure updates
[2,"53740","490009398N",0,2,3," Bus Stop Closed\n Please use the next stop\n or the previous stop \n to catch your bus",1657900800000]
Let’s ping @jamesevans as my only wild guess is that there was a problem with the SMS delivered status messages and the 0,0,3,“Test message”,1725145320000 is a keep-alive for the displays.