Seven Signs Secret Ritual of the Priests, bug?

In the fourth chamber, where you need to input the pass, either left or right, the last 2 guards with a female guard in the middle have a bad sync, cuz they reach the opposite sides at the same time:

Quote:

1) x -> ____0 ______<- x 2) __x -> ____0 ___<- x 3) _____x -> ____0 _<- x 4) ______<- x ____0 x ->

I wait like five minutes and both got the same speed so always is the same pattern. I couldn't get through. Videos in youtube show a different pattern more like the first group of soldiers in that room...

I will try again later, but dunno what will happen...

Seven Signs Secret Ritual of the Priests, bug?