My smart TV (LG) seems to have the same problem. I haven’t really dug into it.
I stream with an HT streamer which I send to my HT reciever and then just use my smart TV as a monitor.
For watching 2 channel TV (most shows are not in surround sound) I run a Toslink cable out to my sound system. So I can conveniently stream 2 channel sound through my TV and not even turn the HT reciever on. For multiple channel sound I use the HT streamer and HT reciever.
I’ll look into what @erik_squires posted. Don’t know what CEC is.
Jerry