constraint in a custom sopc component

Hi, i did a macro that enhance the contrast of an image. I have implemented as a sopc custom component.

It has a pll inside that doubles the frequency for some elaboration and then i return to the normal frequency before output the results.

I have 3 parallel channel for R G and B elaboration.

If i use signal tap for watching the red channel, i see that the red data flows stable to the output instead of the green and blue data that give me some wrong results.

I think signal tap is adding some constraint to the red channel and this helped.

How i can constraint better my macro?

In input i have the SOPC system clock.

Is the internal clock related with the SOPC system clock? I think yes so i don't understand why i have these timing problems.

Thank you