I have the same issue.. On mobile and chrome also shows some flickering issues and no rendering it properly. Most of the portion manage with 'x' and 'y' value.
like this
.from(".step_5_bottom_left_img", 1.2, {
y: '-300%'
}, "2")
.from("p.step_5_left_3", 1, {
y: '-600%'
}, "1")
.from("p.step_5_left_4", .5, {
y: '-700%'
}, "1")