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 pathlightsI can't figure this out and read through all the forum posts. Not even clear how to contact support other than calling.