title: highchart line don't show line even when data points exists
body: <p>I have an issue with highcharts of type 'spline'</p>
  
  <p>I've sent data to the chart and even that the data exist the chart line seems to be cut at random parts</p>
  
  <p>more ever between null points on the graph a line is drawn(the drop on the 12/06/16 in the black series) so it isn't a null issue. and I've got no errors on my console.
  this is my graph init:</p>
  
  <pre><code>getChartElement().highcharts({
                      exporting: {enabled: false},
                      chart: {
                          type: 'spline',
                          zoomType: 'x',
                          events: {
                              selection: rangeSelection
                          }
                      },
  
                      title: {
                          text: ''
                      },
  
                      credits: {
                          enabled: false
                      },
  
                      tooltip: {
                          useHTML: true,
                          formatter: function () {
                              return '&lt;b&gt;' + this.series.name + '&lt;/b&gt;&lt;br&gt;' +
                                  Highcharts.dateFormat('%e %b %Y %H:%M', this.x) + '&lt;br&gt;' +
                                  Highcharts.numberFormat(this.y, 2);
                          }
                      },
  
                      series: series,
  
                      xAxis: {
                          type: 'datetime',
                          tickPixelInterval: 100,
                          labels: {
                              format: '{value:%m/%d/%y}'
                          },
                          events: {},
                          plotLines: [{
                              value: vm.issueDate,
                              width: 1,
                              color: 'green',
                              dashStyle: 'dash',
                              zIndex: 5,
                          }]
                      },
  
                      yAxis: {},
  
                      plotOptions: {
                          series: {
  
                              turboThreshold: configuration.maxGraphPoints
                          },
                          spline: {
                              marker: {
                                  enabled: vm.isMarkersVisible
                              }
                          }
                      }
                  });
  </code></pre>
  
  <p>I can't seem to find a reason for the gaps in the graph. has anyone seen something like this before?</p>
  
  <p><strong>EDIT:</strong>
  I've changed the image to another more concentrated , and added the data for this graph
  <a href="https://i.stack.imgur.com/B0rZQ.png" rel="nofollow noreferrer">screenshot of the issue</a> I should say that in the screen shot there is one point but there are a lot more around it, they should have option for a screenshot gif :)
  the data:
  "{"tags":["Series1","Series2"],"data":[[1483436500000,34.219906,56.668186000000006],[1483439200000,34.047556,57.155266],[1483441900000,34.068456,57.649016],[1483444600000,34.050936,58.448235999999994],[1483447300000,34.316396,58.039416],[1483450000000,34.546116,58.428616000000005],[1483452700000,34.743466,58.722346],[1483455400000,34.850176,58.737145999999996],[1483458100000,35.050486,58.115166],[1483460800000,35.002866,57.522126],[1483463500000,34.855796,55.661925999999994],[1483466200000,34.796566,55.579976],[1483468900000,34.914366,55.925126000000006],[1483471600000,35.037526,56.223866],[1483474300000,35.008276,55.952646],[1483477000000,34.938055999999996,55.601265999999995],[1483479700000,34.946396,57.74743599999999],[1483482400000,34.860726,56.422796000000005],[1483485100000,34.749856,56.456556000000006],[1483487800000,34.734536,56.02268599999999],[1483490500000,34.710696,55.649186],[1483493200000,34.755316,55.868066],[1483495900000,34.801966,56.07148599999999],[1483498600000,35.175086,55.311626000000004],[1483501300000,34.868296,55.749516],[1483504000000,34.498436,56.425416],[1483506700000,34.526066,56.405936],[1483509400000,34.495226,56.905456],[1483512100000,34.736996,57.665266],[1483514800000,34.403805999999996,56.243786],[1483517500000,34.445266,57.025186000000005],[1483520200000,34.474966,58.428715999999994],[1483522900000,34.225066,59.531206],[1483525600000,33.961646,60.677266],[1483528300000,33.786636,61.355536],[1483531000000,33.875166,60.646305999999996],[1483533700000,33.905626,62.193096],[1483536400000,33.937476,61.098146],[1483539100000,34.293316,59.28490599999999],[1483541800000,34.530886,59.912486],[1483544500000,34.782956,59.955256000000006],[1483547200000,35.121126,61.357696000000004],[1483549900000,34.718436,61.931906],[1483552600000,35.711916,57.322496],[1483555300000,35.475236,57.541686],[1483558000000,35.481466,56.810136],[1483560700000,35.040016,56.614756],[1483563400000,35.030556,59.863856],[1483566100000,34.920466,56.529756000000006],[1483568800000,35.050486,58.436576],[1483571500000,35.050486,57.734145999999996],[1483574200000,35.156616,57.434805999999995],[1483576900000,35.154466,57.73637599999999],[1483579600000,35.101836,58.059096],[1483582300000,35.051496,57.998926],[1483585000000,34.998855999999996,58.298096],[1483587700000,34.911516,58.426916000000006],[1483590400000,35.028296,58.00146599999999],[1483593100000,34.748786,58.137996],[1483595800000,34.739406,57.887506],[1483598500000,34.808656,58.491716],[1483601200000,34.785016,57.416966],[1483603900000,34.971316,57.39732599999999],[1483608700000,null,64.130136],[1483609300000,34.633606,null],[1483611400000,null,53.998146000000006],[1483612000000,35.536296,null],[1483614100000,null,56.150756],[1483614700000,35.490406,null],[1483616800000,null,56.581025999999994],[1483617400000,35.243436,null],[1483619500000,null,57.063676],[1483620100000,35.638996,null],[1483622200000,null,57.347356000000005],[1483622800000,35.638996,null],[1483624900000,null,58.504306],[1483625500000,35.940726,null],[1483627600000,null,58.529796000000005],[1483628200000,36.022656,null],[1483630300000,null,56.503736],[1483630900000,36.081686,null],[1483633000000,null,55.968286000000006],[1483633600000,36.372056,null],[1483635700000,null,56.637946],[1483636300000,36.719646,null],[1483638400000,null,55.93278599999999],[1483639000000,36.721016,null],[1483641100000,null,54.665316000000004],[1483641700000,36.902646,null],[1483643800000,null,54.823786],[1483644400000,37.109685999999996,null],[1483646500000,null,54.314856000000006],[1483647100000,37.317226,null],[1483649200000,null,54.75750600000001],[1483649800000,37.364876,null],[1483651900000,null,54.618516],[1483652500000,36.959966,null],[1483654600000,null,54.384485999999995],[1483655200000,37.191016,null],[1483657300000,null,53.986126],[1483657900000,37.354926,null],[1483660000000,null,53.833296000000004],[1483660600000,37.128735999999996,null],[1483662700000,null,53.708625999999995],[1483663300000,37.340576,null],[1483665400000,null,53.942555999999996],[1483666000000,37.298246,null],[1483668100000,null,54.327676],[1483668700000,37.344015999999996,null],[1483670800000,null,52.919466],[1483671400000,37.384856,null],[1483673500000,null,52.566205999999994],[1483674100000,36.876546,null],[1483676200000,null,51.773675999999995],[1483676800000,36.821936,null],[1483678900000,null,51.389706000000004],[1483679500000,36.769695999999996,null],[1483681600000,null,53.077135999999996],[1483682200000,36.648186,null],[1483684300000,null,52.533496],[1483684900000,36.490846,null],[1483687000000,null,51.950295999999994],[1483687600000,36.326346,null],[1483689700000,null,53.609016],[1483690300000,36.595346,null],[1483692400000,null,52.940315999999996],[1483693000000,36.005396,null],[1483695100000,null,52.44433599999999],[1483695700000,36.063386,null],[1483697800000,null,51.514185999999995],[1483698400000,35.950686,null],[1483700500000,null,53.019206],[1483701100000,35.888916,null],[1483703200000,null,52.924876],[1483703800000,3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