When launch project B, the keys from project A, How? Why?

I got 2 projects 4.27.2
Project A with touch key [Fire]
Project B with no touch keys

when I launch Project A to my android by cable, I can see [Fire] key on the screen, ok, that’s normal because the project build like that. But when I launch Project B to my android by cable, why I can see the [Fire] key from Project A? it doesn’t make any sense, there is no key setup on Project B.

that’s made me crazy, whats wrong?