Cr@ppy Smart Hub 2

[WSH]

"...will be shielded so unlikely to cause any interference."

But the shielding would also block the Wi-Fi signal.  What does tend to work is if the TV is on a stand with a decent gap underneath.

[Kimberlin]

@WSH  I can literally only state from personal experience of the router being in the same place for the last 4 years. I just don't have any WiFi problems where the router is positioned. The TV is mounted on a dedicated media unit that has a 2cm gap between the bottom of the TV and the unit. What there is however, is a large open area behind the TV, but one cannot see the router unless you peer over the top of the TV. The router is positioned in a corner of the lounge directly next to an external wall. My bedroom is 15 metres away from the router and it gets a full on 5ghz WiFi signal that doesn't drop, no WiFi extenders involved. But then the house is a recent new build and there's absolutely no internal brick walls to worry about. The house is effectively, a large detached bungalow.

[WSH]

Oh, I'm not arguing with you.

Many years ago now, I set up an HH5 for my mother and the only place I could put it was behind a very solid Samsung TV.  (One of the early flat panel offerings).  Much to my amazement, it always worked very well, but I put that down to the large gap at the bottom of the TV because of the stand it was on and that fact you could see the HH5 under the TV.

Certainly, the traditional accepted wisdom in the trade is that putting it behind a TV is a bad idea.

[chrisjp]

"The TV, unless you’re watching some ancient bit of kit from the 20th Century, will be shielded so unlikely to cause any interference"

I think it's the fact that modern TVs are heavily shielded that makes them opaque to the WiFi radio waves emitted by routers. Certainly, when I tried to put a WiFi mesh unit behind my TV it just didn't work, but did so when I put it in front of the TV to one side.
Maybe in your case you get some useful reflections and I guess the multiple transmitting aerials help also.