diff --git a/src/ui/databrowserModule/fileviewer/chart/chart.base.ts b/src/ui/databrowserModule/fileviewer/chart/chart.base.ts
index fdc61a3bb29d746f582aea17ddcd1e7ba6ad4237..98d736d35e6b03a940428e5e1496a409a72427eb 100644
--- a/src/ui/databrowserModule/fileviewer/chart/chart.base.ts
+++ b/src/ui/databrowserModule/fileviewer/chart/chart.base.ts
@@ -38,12 +38,13 @@ export class ChartBase{
         interval(500).pipe(
           map(() => this.canvas && this.canvas.nativeElement),
           filter(v => !!v),
-          take(1),
           switchMap(el => 
             from(
               new Promise(rs => el.toBlob(blob => rs(blob), 'image/png'))
             ) as Observable<Blob>
-          )
+          ),
+          filter(v => !!v),
+          take(1)
         )
       ),
       map(blob => {
diff --git a/src/ui/databrowserModule/fileviewer/chart/line/line.chart.component.ts b/src/ui/databrowserModule/fileviewer/chart/line/line.chart.component.ts
index 4defd73c0f2a04c2cb83cc56c977a3168a03ab7f..15b387dd893b28d9a80adb4c0db0d57195556c82 100644
--- a/src/ui/databrowserModule/fileviewer/chart/line/line.chart.component.ts
+++ b/src/ui/databrowserModule/fileviewer/chart/line/line.chart.component.ts
@@ -111,10 +111,6 @@ export class LineChart extends ChartBase implements OnChanges, CommonChartInterf
     super(sanitizer)
   }
 
-  ngOnInit(){
-    this.pngUrl$.subscribe(console.log)
-  }
-
   ngOnChanges(){
     this.shapedLineChartDatasets = this.lineDatasets.map(lineDataset=>({
       data: lineDataset.data.map((v,idx)=>({
diff --git a/src/ui/databrowserModule/fileviewer/chart/line/line.chart.style.css b/src/ui/databrowserModule/fileviewer/chart/line/line.chart.style.css
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..7575b8e3247550c8d145a91ba034199fddc2feb9 100644
--- a/src/ui/databrowserModule/fileviewer/chart/line/line.chart.style.css
+++ b/src/ui/databrowserModule/fileviewer/chart/line/line.chart.style.css
@@ -0,0 +1,4 @@
+:host
+{
+  display: block;
+}
diff --git a/src/ui/databrowserModule/fileviewer/chart/radar/radar.chart.style.css b/src/ui/databrowserModule/fileviewer/chart/radar/radar.chart.style.css
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..7575b8e3247550c8d145a91ba034199fddc2feb9 100644
--- a/src/ui/databrowserModule/fileviewer/chart/radar/radar.chart.style.css
+++ b/src/ui/databrowserModule/fileviewer/chart/radar/radar.chart.style.css
@@ -0,0 +1,4 @@
+:host
+{
+  display: block;
+}