Some pathlights offline

I've been trying for weeks with no luck. I have 8 pathlights. All were working fine for a few months then a few stopped connecting to bridge and now 5 are offline. Bridge is right next to pathlights and working pathlights have strong signal. Things I've done: - I've reset bridge several times. - charged the pathlights overnight to make fully sure they were charged - Added and re-added offline pathlights (app will show them online and lighted but no light and then offline a minute later) - deleted and reinstalled the app - removed batteries and swapped with online pathlights I can't figure this out and read through all the forum posts. Not even clear how to contact support other than calling.