low memory issues with a multicock variant

I tracked it down. See comments below.

function startdraw() {
  Bangle.drawWidgets();
  ///face.init();   // No as startDraw() will be called when LCD comes on again
  face.startTimer();
}
function setButtons(){
  function nextFace(){
    iface += 1
    iface = iface % FACES.length;
    stopdraw();
    face = FACES[iface]();
    face.init();   //  only call init() when switching faces 
    g.clear();
    g.reset();
    startdraw();
  }

the standard code for stopping / starting the draw/timers

Bangle.on('lcdPower',function(on) {
  if (on) {
    startdraw();
  } else {
    stopdraw();
  }
});