Ewelink start up Issue

Good Day, Sorry for posting this once again but am still having a problem whereby my Sonoff devices will not respond to On/Off trigger after the system has be Idle for a few hours… I than have to go to the Ewelink add on in supervisor and do a Restart (the red button) than all switches respond again. Am using LAN mode. Please if anyone has a better understanding to point me in the right direction to resolve this issue. Thanks.