Samsung tv 7 series smrt things problem

On my samsung tv 7 series sometime cant turn on tv from smrt things app. I try eith google assistant but it say "turning on living room tv’ and nothing happen. After 20-25 try works. When work, if i turn off tv same problem. My tv is connected to 5ghz wifi.

With chromecast work fine if tv is in hdmi mode, if is tv mode only turn on but turn off not work.

Sory for bad english