Sorry for the delay to get back to this. Crazy day, and multiple vehicle problems as well...
TV signals are more commonly (or at least used to be) only commonly horizontally polarized. But that may be changing:
https://www.channelmaster.com/blogs/free-tv/real-world-signal-propagation-what-you-need-to-know
That is, I might add, a VERY interesting article that I stumbled into, tonight. Note the section on multipath and signal polarization alteration by various objects. This silos I mention have CONICAL metal tops. Oh, boy...
Maybe I should lobby the owner (big operation wealthy farmer - their house is almost a mansion) to put up a tall receiving antenna with rebroadcast...
“Those silos” -sheesh. Long day...
Oh no problem, multitasking is the norm nowdays, same here. :)
What made me consider polarization was the indoor and homemade D-TV antennas. I noticed the elements are at about a 45 degree angle. And we know that they are not directional so I always wondered why. I have absolutely zero D-TV broadcasts to play with out here in the boonies or I would experiment with polarization.
But you might be on the right track with the polarization alteration from the tops of the silos, or the sides being round might be fanning the waves and causing some sort of self cancellation of the waves. It is kind of crazy though that you are so close to that one source and still can’t beam straight from it.
Honestly? I would try an amplifier. I know it is counter-intuitive being that close to the source, but it could boost what pure waves you are getting and cause the digital receiver to override the chaos. Kind of like how a digital FM radio goes in and out of “stereo” lock from terrestrial blockages when you have the LOC option on but doesn’t when you have LOC off.
Tell you what, on another note. We are all going to start having problems with these things as 5G becomes more common. I already had to replace my LNB on my C-Band dish with one that has a 4G-5G filter. They are utilizing the C-Band satellites for 5G and it goofed up my receiver trying to make sense of the chaos I am now receiving from these old birds.