@Solla-topee Well I tried factory reset on the triggering device and it fixed it... I'm annoyed that this worked since it must've broken by some action from TP Link.. Oh well, it works again.

@Solla-topee 2 smart actions between 5 different devices, all accessible remotely, and both smart actions stop working simultaneously..that has to be an issue on TP Link's end... Factory resetting 5...

@Solla-topee Smart actions stopped working for me at the same time and are still down. I have 2 smart actions I've been using reliably for over a year that just stopped working at all..