Stargate?
The app I use, I think just recognizes the first letter of a rebus for determining when the puzzle is “solved”, and ignores the rest. So if you had entered your rebused letters in the opposite order, it might have called it wrong.
Heh - I say, heh.
“Richard Dean Anderson, of the four “Star” franchises: Wars, Trek, Gate, and Search , “Gate” is easily in my top three!”