Multiple timer sensors with the same total time are desynced.
(1)Build 3 new "Timer Sensors"(A,B and C)
(2)Pause the game.
(3)Set A to green 6s and red 12s, B to green 9s and red 9s, C to green 12s and red 6s.
(4)Click "Reset Time" of all timers.(Image 1,2,3)
(5)Unpause the game.
(6)Wait for 1 cycle.
(7)A and C were still synced, but B was desynced.(Image 4,5,6)
build timer sensors 6+12, 9+9, 12+6, and reset all. then wait for 1 cycle.