74HC595N control solenoid - arduino startup problem

[gunsha]

Sorry! i've attached the breadboard i'm using to test, and the board i've designed where i use the TIP112 with the solenoids.
the only differences from the breadboard and the PCB are the pull downs(10k) on pin 8, 11 & 12, and pin 4 to OE with also a pull down.

Here's the code i'm testing with, the one that takes almost a second to reset al the outputs of the 595:

#include <MultiShiftRegister.h>

/*
  Shift Register Example
 for 74HC595 shift register

 This sketch turns reads serial input and uses it to set the pins
 of a 74HC595 shift register.

 Hardware:
 * 74HC595 shift register attached to pins 8, 12, and 11 of the Arduino,
 as detailed below.
 * LEDs attached to each of the outputs of the shift register.


 Created 22 May 2009
 Created 23 Mar 2010
 by Tom Igoe

 */

//Pin connected to latch pin (ST_CP) of 74HC595
const int latchPin = 8;
//Pin connected to clock pin (SH_CP) of 74HC595
const int clockPin = 12;
////Pin connected to Data in (DS) of 74HC595
const int dataPin = 11;

MultiShiftRegister msr (2 , latchPin, clockPin, dataPin); 

void setup() {
  Serial.begin(9600);
  Serial.println("start");
  //set pins to output because they are addressed in the main loop
  pinMode(latchPin, OUTPUT);
  pinMode(dataPin, OUTPUT);  
  pinMode(clockPin, OUTPUT);
  pinMode(4, OUTPUT);
  
  for(int a = 0;a<9;a++){
    msr.clear(a); 
    msr.shift();
  }
  
  digitalWrite(4,LOW);
}

void loop() {
  if (Serial.available() > 0) {
    String input = Serial.readString();
    input.trim();
    int bitToSet = 99;
    if(input.equals("_0")){
      bitToSet = 0;
     }else if(input.equals("_1")){
       bitToSet = 0;
     }else if(input.equals("_2")){
       bitToSet = 2;
     }else if(input.equals("_3")){
       bitToSet = 3;
     }else if(input.equals("_4")){
       bitToSet = 4;
     }else if(input.equals("_5")){
       bitToSet = 5;
     }else if(input.equals("_6")){
       bitToSet = 6;
     }else if(input.equals("_7")){
       bitToSet = 7;
     }else if(input.equals("_8")){
       bitToSet = 8;
     }else if(input.equals("_9")){
       bitToSet = 9;
     }
     if(bitToSet != 99){
       msr.set(bitToSet); 
       msr.shift(); 
       delay(2000);
       msr.clear(bitToSet); 
       msr.shift();  
    }
  }
}