I am having an issue on my Raspberry Pi 3 where i have a sms trigger that was setup and working fine for a few weeks and then all of the sudden the triggers stop working. If i delete and add back the trigger notification then it works fine again. I've also had an issue with other trigger events not firing off. For example i have my garage door controlled by a relay and i have a trigger event setup so that once the relay turns on then it also turns right back off to reset it and that has stopped working as of today. i've tried rebooting the Pi and there is no change. I also just looked in the Trigger section of Cayenne and it says the last time both the notification and the garage door relay reset were on 3/14, but the last text message on my phone is from Sunday 4/2.
I've also experienced something similar with an arduino board - I've got a X-board that has a 2 relays mounted on the board and i have it controlling my garage lights using a PIR sensor. It was working great and then all of the sudden the lights stopped coming on even if the PIR sensor was showing a 1, it wouldnt trigger the relay to turn on. I even tried replacing the PIR sensor with another and no luck.