Same issue here, but I just got a message from IFTTT: “ Hello,
We are writing to inform you that we will soon be rolling out a fix for Applets with triggers that were not observing Daylight Savings Time (DST).
Your Applets should run at the correct times for your timezone following the release.
The IFTTT Team”
Not sure though if this explains my issue because my Yeelight also lost connection with Alexa at the same moment IFTTT stopped working. I’ve tried deactivating and reactivating Yeelight skill on Alexa. Tried activating Mi Home skill (not necessary before) and still no success. That’s when I decided to try IFTTT to “solve” the broken routines on Alexa and found out the service was out.