Thanks for sharing. At least we know its not our hardware. I wish Samsung had confirmed this here instead of telling us we need to get the TV serviced. It's a bit annoying. Any idea how to look into timing on this?
Fixed today, Samsung released a software update for my Galaxy S8 build number: G950USQU7DTG2 security patch level: 2020-06-01.
I am now able to screen mirror via the SmartThings app from my phone to the TU8000 like it should with the image of the phones screen on the TV.
So anyone else should check there phone for a software update.