Same issue, I bought 4 HS105 mini smart plugs and they constantly disconnect even with latest firmware 1.5.2 and strong signal strength -59dBm to -66dBm. It’s very frustrating and dump to have replug...

I have the same issue, smart plugs loosing connection randomly (solid orange) and more than few times a day. I bought 4 smart plugs in early December 2018, firmware 1.5.2, signal -56dBm to -66dBm...