PCD8544 display behaves differently with saved()'ed code

Wiring is almost the same as for "direct soldering screen to Espruino", except mine screen is powered from GND and 3.3. Espruino itself powered with step-up from U1V10F3 from Pololu (solar => supercapacitor => stepup). So, in theory, I have always 3.3 for Espruino and screen.

I'm using KS version(1.3?) with v72 firmware.

require("Font6x8").add(Graphics);

SPI1.setup({ baud: 2000000, sck:A5, mosi:A7 });

var interval = 10;

var g;
var time;
var voltage;

function onInit() {
  time = 0;
  
  
  setTimeout(
    function() {
      g = require("PCD8544").connect(SPI1,A6,B1,B0, function() {

        //g.clear();
        //g.drawString("Init complete.", 0, 1);
        //g.flip();

        A4.write(1);
        A4.write(0);

        setInterval(onTimer, interval * 1000);
        //g.setContrast(0.5);
        g.setFont6x8();
      });
    },
    5000
  );

}

function onTimer() {
  voltage = analogRead(A3) * E.getAnalogVRef();
  time += interval;

  g.clear();
  g.drawString("Seconds: " + time, 0, 0);
  g.drawString("Volts: " + Math.round(voltage*100)/100, 0, 8);
  g.drawString("Reference: " + Math.round(E.getAnalogVRef()*100)/100, 0, 16);

  g.flip();
}