Animation which uses trigger is played twice before going back to the previous state.

Its a rolling animation which can only happen if the player is in the running state as you can see below. I'm using the 'space' key to trigger the animation and it works fine. However, when it goes back to the 'run' state, it performs another roll animation and then will finally return to the 'run' state. Please have a look at the pictures below. Anyone knows how to fix that in order to get the animation to happen only once?