Now that you mentioned this, I experienced something like that on distances where I start to have bad signal.
What is strange is that I noticed that I can control drone with sticks but camera and pictures buttons does not respond. When drone is closer to me and I have better signal then these buttons works fine. So it's not about buttons but it is something with connection. Or maybe delay is too high. But again, I can, to some extent, control drone with sticks (with very choppy video transmission), and in the same time stopping video recording and taking pictures does not work, or starting video recording if I had camera in video mode. And I think that I did try to do it from mobile app, but that didn't work also. Everything works fine when I get drone little closer to me.
Did you mean something like that?
Does anyone else experienced this?