KD49XG9005 update software to 6546. TV now reboots after a period in standby. It was fine on previous version. On researching seems to go back for some time as a generic problem. Tried clearing cache, switching wifi on and off as suggested on some posts. Inconsistent behaviour makes difficult to use harmony controller and of course means waiting for reboot.   Anybody got understanding if what causes this and found a solution. 

ok with reset if I have but want to avoid and prefer if someone can confirm it worked from them.