This is related to the functionality of the new Bang & olufsen app in iOS (I'm not sure about the other platforms)...
Here's my story shortly:
I have been using the Beoplay E8 happily. And on top of the sound quality, I was sold about the ToneTouch feature, getting a wider sound stage really appealed to me on the E8.
When I was later in life looking for bigger bluetooth headsets that I could also use with a cable (for my TV and other non-BT devices), My first choice was automatically the H9i.
Anyways, I now have been using my H9i very happily as well, with the complimentary Beoplay app. And of course there is the consolidation of the apps into the new Bang & Olufsen app and there is a warning the old Beoplay app will be closed in 2019.
Here's the catch: I immediately noticed in the new Bang & Olufsen app, that the ToneTouch feature didn't allow me to pinch and widen the soundstage. I could move around the four EQ presets but no pinching.
I wrote to the developers, thinking this was a bug. And some months later, I received this reply:
"Hey Berke, At this time our B&O app does not have the exact same features as our Beoplay app. However we are always working on adding more features and updates to our apps. Update: I'm afraid that the ability to widen the soundstage in ToneTouch has been removed from some of our products. This was due to the fact that it caused an imbalance between the left and right audio channels. Feel free to reach out to us at: link Best regards, Bang & Olufsen support."
I feel a little bit played. Purchasing a product, only to have a piece of it removed afterwards is not the best customer experience! I really wish that this was an error and B&O would restore the ToneTouch functionality on the H9is!
By the way, this is still possible on the Beoplay app, I can still change the soundstage there and if I enlarge the circle, when I open the other B&O app, the circle is exactly where and how I left it, but I cannot manipulate it in the new app.