Weird, i can see it on my side. Just a follow up - i downloaded the Octopus app from the Playstore. Removed the
Gamesir World app and debugger tool from my Huawei phone. Installed Octopus and it is working perfect with controller now. Just like on my old Samsung S4. With the video i posted, you always had the virtual sticks on the screen, even when you controlled it by the
Gamesir. You also had to assign the control buttons to the touch screen icons. Now everything is working from the buttons from the controller itself, just like in the controller diagram shows. When the contoller is connected to your phone via bluetooth, and
Tello via wifi, you will still see the virtual sticks. Go to controller settings, and you will see
Gamesir T1s connected. Under that there is also
Gamesir T1 GCM disconneted. Click on that to connect. Now the virtual sticks are gone, and you can fly like a champ

Remember: there must be 2 connections showing in bluetooth controller settings, the GCM is what makes the contoller work.