I have not been able to figure out why the dataset I load does not appear in the chart I created in Google Earth Engine. I am new to GEE and JavaScript in general, so I may be missing something obvious. I created a buffer that I want the data pulled from and show up in the chart. I also have two charts created for different time periods in the dataset. A few data points show up for the "winter chart" but none in the "summer chart".

       
       var dataset = ee.ImageCollection("OSU/GIMP/ICE_VELOCITY_OPT");
       var midgard = ee.Geometry.Polygon(
        [[[-37.32658582874774, 66.895336960199],
          [-37.32658582874774, 66.37689364195774],
          [-35.69511610218524, 66.37689364195774],
          [-35.69511610218524, 66.895336960199]]], null, false);
        var red = ee.Geometry.Point([-36.838012316827125, 
        66.40520627951635])
        
        //Winter speed
        var wMagnitude = dataset.filter(ee.Filter.date('1985-10-01', '2016-05-31'))
        .filter(ee.Filter.calendarRange(10, 5, 'month'))
        .filterBounds(midgard);
        function clip (image){
        return image.clip(midgard);}
       var clipped = wMagnitude.map(clip);
       var wSpeed = clipped.map (function(image){
       var winterIceSpeed = image.expression(
       'sqrt (x**2+y**2)',{
       'x': image.select('velocity_x'),
       'y': image.select('velocity_y')
       }).rename('winterSpeed')
       .log10();
       var time = image.get('system:time_start');
      return winterIceSpeed.set ('system:time_start', time);});
      var vizParamsMag = {transparency: '0.5',
      min: 1,
      max: 3.7,
      palette:['FFFFFF','f98686','FCD163','0dca00','08c6ff','5600ff','f904f1','803034']
      };
     Map.setCenter(-36.63,66.49, 8); 
     print(wSpeed,'Winter speed');
     Map.addLayer(wSpeed, vizParamsMag,'winterSpeed');
     
     //Summer Speed
     var sMagnitude =dataset
     .filter(ee.Filter.date('1985-06-01', '2016-09-30'))
     .filter(ee.Filter.calendarRange(6,9,'month'))
     .filterBounds(midgard);
     function clip (image){
     return image.clip(midgard);}
     var clipped2 = sMagnitude.map(clip);
     var sSpeed = clipped2.map (function(image){
     var summerIceSpeed = image.expression(
     'sqrt (x**2+y**2)',{
      'x': image.select('velocity_x'),
      'y': image.select('velocity_y')
      }).rename('summerSpeed')
     .log10();
     var time2 = image.get('system:time_start');
     return summerIceSpeed.set ('system:time_start', time2);});
     var vizParamsMag2 = {transparency: '0.5',
     min: 1,
     max: 3.7,
     palette:['FFFFFF','f98686','FCD163','0dca00','08c6ff','5600ff','f904f1','803034']
     };
     print (sSpeed,'summer speed');
     Map.addLayer(sSpeed, vizParamsMag2, 'Summer speed');
     
     // red Buffer
     var redBuffer = [ee.Feature(red)]; print (redBuffer,'redbuffer');
     var redBuffered = ee.FeatureCollection(redBuffer);
     var rBuffered = redBuffered.map(function(f) {
     return f.buffer(1500);  
     });
     Map.addLayer(rBuffered, {color: 'red'}, 'redbuffer');
     
    //red buffer charts
    //clipping to collection for winter and summer
    var wRedClipCollection = wSpeed.map(function(img){return img.clipToCollection(rBuffered)});
    var sRedClipCollection = sSpeed.map(function(img){return img.clipToCollection(rBuffered)});
    print (wRedClipCollection,'winterRedBufferClipped'); 
    print(sRedClipCollection,'summerRedBufferClipped');

    //creating the chart for winter of red buffer
    var wRedBufferChart =
     ui.Chart.image
         .seriesByRegion({
           imageCollection: wRedClipCollection,
           band: 'winterSpeed',
           regions: midgard,
          reducer: ee.Reducer.mean(),
          scale: 30,
          seriesProperty: 'label',
          xProperty: 'system:time_start'
        })
        .setOptions({
          title: 'Winter Ice Speed at Red Buffer',
          hAxis: {title: 'Date', titleTextStyle: {italic: false, bold: true}},
          vAxis: {
            title: 'Winter Ice Speed',
            titleTextStyle: {italic: false, bold: true}
          },
          lineWidth: 5,
          colors: ['f0af07', '0f8755', '76b349'],
        });
      print(wRedBufferChart);
    //creating the chart for summer of red buffer
    var sRedBufferChart =
    ui.Chart.image
        .seriesByRegion({
          imageCollection: sRedClipCollection,
          band: 'summerSpeed',
          regions: midgard,
          reducer: ee.Reducer.mean(),
          scale: 30,
          seriesProperty: 'label',
          xProperty: 'system:time_start'
        })
        .setOptions({
          title: 'Summer Ice Speed at Red Buffer',
          hAxis: {title: 'Date', titleTextStyle: {italic: false, bold: true}},
          vAxis: {
            title: 'Summer Ice Speed',
            titleTextStyle: {italic: false, bold: true}
          },
          lineWidth: 5,
          colors: ['f0af07', '0f8755', '76b349'],
        });
       print(sRedBufferChart);