[About a little blink when booting]

Hi,

Recently I bought a Thermaltake View 51 and I mount it and synchronized everything well. The first days I've seen that when I turn on the computer, the RGB fans did a little White blink before they synchronize with the color of the motherboard. I know that this is pretty normal (someone explained me that this is a test that the controller do in order to check if the fans are right). But lately, the back 120mm fan started to not doing this little blink when I turn on the computer (or it'll do it in another color).

Is this normal? is there a way to solve it? I have to say that it does the synchronization with the motherboard.

 

Thank you.