Ecobee has an eyesight problem
If you have an ecobee3, and the proximity sensor doesn’t seem to be working right. Zatz Not Funny! has a quick fix for a common manufacturing issue.
Namely, a number of recently shipped devices feature misaligned ecobee sensor component to sensor window. Indeed, I had set up a sensor in my soon-to-arrive baby’s room … but it rarely showed the room as Occupied – a requirement for ecobee’s “Smart Away” and “Follow Me” features.