John Ferrell wrote:
. . .
I really don't know why there is more TVI with a high swr. But my
experience has been that there is, especially on 6 meters.
John Ferrell W8CCW

It might be that the same phenomenon, or related ones, have caused both
the high SWR and the TVI. But high SWR doesn't cause TVI. Or feedline
radiation, which is another mistaken idea.

Roy Lewallen, W7EL