Thank you so much for your reply Marco.
It was not finishing the setup(). I think it was freezing before P.begin() cause the buttons connected to the mux also dont responde when it freeze.
I cleaned up the code a bit and deleted some unused variables. Arduino is running OK now and the displays are also functional. I guess you were right about the ram issue.
As you see in my code, I have two arrays that hold the text to display on Zone 0 and 1. My aim to display static text when I switch a preset with footswitches. I would love to have a scroll effects when texts changes but couldnt manage it. To be honest my coding skills is very limited and I am heavly dependent on copy/pasting from other code samples. I am sure you already realized it as soon as you checked my full code. For about the display zone text for loops; this is the best I coould. I tried to remove P.displayAnimate() and P.displayReset() from the for loop but the displays go blank and cannot show anytext when I do that.