I've had my HS300 smart strip for over a year and a half. I only have one schedule created for it, and that's to turn off plug #1 at midnight (12:00am). It was working fine until a few weeks ago, around the time DST fell back an hour. Now it shuts off at 11:00pm, AND 12:00 am (if I turn it back on).
No other systems are controlling it. Alexa knows about it, but I have no routines setup for it, only in Kasa.
I tried deleting the device and re-discovering it, but it made no difference.
I have no idea why this is happening, but it's VERY annoying.