Huge issues

Any help greatly appreciated, posted previously about the LG problem a couple of days ago. Mine updated to .16 but nothing changed. The issue I’ve had is if playing the app through the TV it takes a few seconds to connect to server then when playing a file says unexpected error after a few seconds. I’ve cast directly from the pc to the TV and does the same after minutes. Through the ps4 is the same issue. Yet if I put my chrome cast on(different TV) and cast from my phone (htc u11) it works perfectly with out any problems. All apps,server etc are at latest version and all ports on windows firewall are open.