I've had an issue for at least a month where audio description turns itself on. I have to go into the 3 dot menu to switch it off.
The next day I'll switch on my Sky Glass and it'll be on again.
I've checked with everyone on my house that their not turning it on. None of them had a clue that it was even an option.
It's more of an annoyance than anything else but can't figure out why it's happening.