Contractor's electrician installed caseta in 4 ceiling track lights. Wall mounted controls. Use lutron app on iPhone and Alexa for voice control. No scenes or other effects added thus far. Also added 1 caseta plug-in to control floor lamp. This morning, 2 track heads on kitchen track won't turn off and middle 2 heads won't turn on either with Alexa, iPhone, pico (which I do not generally use), or wall switch. The 2 lights dim but do not completely turn off. Deleted and reinstalled device on lutron app - no change. Deleted and reinstalled device on Alexa. No change. All other lights work.
Suggestions?