Error after switching from the node graph to map view

[MyIgel]

After switchong from the node graph http://localhost:8080/#!/en/graph/9cc7a67853ea back to the map view (or fast switching between them) i get a

Uncaught TypeError: u is null
    Y index-592e0aaf.js:17419
    y index-592e0aaf.js:17421
    setTimeout handler*Y index-592e0aaf.js:17420
    y index-592e0aaf.js:17421
    setTimeout handler*Y index-592e0aaf.js:17420
    y index-592e0aaf.js:17421
    setTimeout handler*Y index-592e0aaf.js:17420
    y index-592e0aaf.js:17421
    setTimeout handler*Y index-592e0aaf.js:17420
    y index-592e0aaf.js:17421
    setTimeout handler*Y index-592e0aaf.js:17420
    gotoNode index-592e0aaf.js:17594
    f index-592e0aaf.js:12766
    f index-592e0aaf.js:12765
    w index-592e0aaf.js:12800
    resolve index-592e0aaf.js:12539
    Dn index-592e0aaf.js:12433
    resolve index-592e0aaf.js:12538
    Dn index-592e0aaf.js:12433
    resolve index-592e0aaf.js:12535
    _onLocationChange index-592e0aaf.js:12732
    _listen index-592e0aaf.js:12711
    qt index-592e0aaf.js:12313
    gg index-592e0aaf.js:12814
    p1 index-592e0aaf.js:22913
    m1 index-592e0aaf.js:22961
    _1 index-592e0aaf.js:22963
    sd index-592e0aaf.js:1
    <anonymous> index-592e0aaf.js:22966

in if (clearTimeout(y), !st && u.alpha() > 0.3) { of

I = 3,
      T = 0.01;
      Ht.setTransform(f);
      function z() {
        a.width = o.offsetWidth,
        a.height = o.offsetHeight,
        Ht.setMaxArea(a.width, a.height)
      }
      function F(q) {
        f.x = q.x,
        f.y = q.y,
        f.k = q.k
      }
      function Y(q, st) {
        if (clearTimeout(y), !st && u.alpha() > 0.3) {
          y = setTimeout(function () {
            Y(q)
          }, 300);
          return
        }
        var A = q(),
        $ = A[0],
        E = A[1],
        O = A[2],
        D = {
          k: O
        };
        D.x = (a.width + e.getWidth()) / 2 - $ * O,
        D.y = a.height / 2 - E * O;
        var W = {
          x: f.x,
          y: f.y,
          k: f.k
        },
        R = Rh(W, D),
        G = po(
          function (K) {
            if (K >= b) {
              G.stop();
              return
            }
            var et = R(zy(K / b));
            F(et),
            window.requestAnimationFrame(U)
          }
        )
      }
      function X(q) {

Originally posted by @MyIgel in #46 (comment)