This bug has been there since 2011 so all I can guess is that the people testing don't read the help screen, or if they are they don't understand what native and passthrough without conversion means. It's strange actually. Last year they changed the help to match the current incorrect behaviour. Now if you go into the help it is back to how it was telling you to select everything achieve "native" to pass through everything, and to deselect what you don't want to achieve a hybrid mode and have just that deselected setting converted.
It's also somewhat funny that
Autodetect selects just 2160p. So most owners won't even be getting Netflix passthrough.
If instead we use the wizard when you Thumbs up etc, even if you Thumbs up all the options (they all work for me in the wizard) then because TiVo adds 1080i it means no 4k. I wonder how many people use the wizard and realise they are not getting 4k. Ever. The picture still looks better than hd but it's 4k downscaled to HD and I suspect the improvement is due to bandwidth given to 4k. But still less good than it could be.
I cannot believe these forums is the only place this is being discussed. Th phone e help centre must a guide that tells use how to work around the bugs else their turnover of customers would be epic. Although judging by my neighbour keep setting his TV to super vivid mod with full smoothing into cartoon like pictures, I can actually imagine there's half the country with substandard pictures and none the wiser.
I myself word have left were it not my alarm hard wired into my Virgin phone line and to redo would need an engineer into the crawl space under the floor (unlikely to find an ADT engineer again open minded enough to do that or allow me to get in there to support the routing).
---------------------------------------------------------- 2011 TiVo scaling bug