Voiceover Unusable with Learned Remote on Apple TV 4th Gen

I accidentally posted this in another user's topic before realising it would be better as a separate topic, apologies.

I gave my visually impaired (registered blind) elderly father my old Apple TV Generation 2 a few months ago. He uses it with a Learned Remote as he finds the small Apple TV remote too small and fiddly to hold properly due to some mobility issues, and the Voiceover reads out the movie titles, descriptions etc very well indeed.

It works great, and he uses it for the sole purpose of watching Netflix movies.

Pleased at how well this works I purchased a 4th Generation Apple TV for him so that he can also enjoy BBC iPlayer, ITV catchup etc.
I setup the voiceover and it works well with all the Apps that I tested, is great. Well done Apple, Amazon Fire is not even in the ball park.
He cannot use the small Apple TV remote very well, and two finger rotor gestures on the small touch pad are out of the question. Due to multiple strokes his speech is not good enough for Siri, so before anybody says 'just use Siri', let's not. This should not really be a problem, the learned remote that he uses on the TV Generation 2 can be learned on the Generation 4 with all the same buttons etc. Sounds simple I thought.

So,
I setup the Voiceover - Works Great
I setup the learned remote - Works Great
Then I enabled voiceover and tried to navigate using the learned remote - TOTAL FAILURE

Remember, this is exactly what we already do on the 2nd Generation TV, and it works wonderfully.

On the 4th Generation TV, using Voiceover with a learned remote, the menus become un-navigable.
The navigation cursor selects icons that are not there (I am sighted and can see what is happening). The navigation also does not always select icons that are really there. The navigation appears to be trying to navigate in a different screen to the one that is actually being displayed.
In Netflix it becomes impossible to navigate vertically downwards, or even to move along the current row. To untrap the navigation I have to use the home button on the Apple Remote, and use the rotors to select a different navigation mode, then it works again with the Apple TV Remote. As soon as I try a learned remote again it all goes down the pan, changes the navigation mode to something unusable and locks up in corrupted navigation pages.

WTF Apple??

What works so brilliantly well in the Gen 2 is a total Train Crash in the Gen 4.
There is no working around it so far as I can work out, and I am hoping that you know better.
I think that Apple tried to be too clever with their new more complicated interface, when really all that many people need is something that is simple and works well.

If Apple want to make the new remote and TV Gen 4 really clever and more accessible here is my take on the 'missed opportunities' that I think would be helpful to many Accessibility users.

1. Most learned remotes have a wealth of 'spare buttons'. Why not let these be learned as shortcuts to any existing button or sequence of buttons, let's call it a macro.

2. Maybe allow an App to have a learned remote button, so on our learned remote we could have a Netflix Button, a BBC iPlayer button etc. Would that be such a big ask?

3. This is the real winner - as a user without speech difficulties I find that the Siri voice control allows me to do things that NO combination of remote buttons can do. For example, "Find War Movies on Netflix" instantly does exactly that.
Why not allow a learned remote button to remember a Siri submission. It does not need to do complicated voice recordings, this is immediately translated to a string of words, so just remember the words. This would allow me to setup a remote that at the touch of a button can locate exactly what my father needs to find without any 'multi-finger mini-touch pad twisting imaginary knob' actions.
Come on Apple, you have been the best. Don't drop the ball now, you are so close!!

4. The 'learned remote' has a set of learned media control buttons that are not really applicable to most remotes, yet miss out buttons that exist directly on the Apple Remote. If you are going to learn another remote it would make sense to at least copy the buttons on the Apple Remote, but Home and Volume are completely missed off, play/pause is turned into two separate buttons rather than just a toggle.
The worst omission is the HOME button, why is this excluded?

Anyway, enough rant, back to my question.

Does anybody know a way to get Apple TV Gen 4 to work with a learned remote and voiceover together in the same way that the Apple TV Gen 2 so effortlessly does.

If you can help I would be most grateful.

Thanks Steve