diff --git a/dao/src/main/java/org/thingsboard/server/dao/resource/BaseImageService.java b/dao/src/main/java/org/thingsboard/server/dao/resource/BaseImageService.java
index 0a6c712729..327f32f5a5 100644
--- a/dao/src/main/java/org/thingsboard/server/dao/resource/BaseImageService.java
+++ b/dao/src/main/java/org/thingsboard/server/dao/resource/BaseImageService.java
@@ -638,7 +638,7 @@ public class BaseImageService extends BaseResourceService implements ImageServic
             ImageCacheKey key = getKeyFromUrl(tenantId, url);
             if (key != null) {
                 var imageInfo = getImageInfoByTenantIdAndKey(key.getTenantId(), key.getResourceKey());
-                if (imageInfo != null) {
+                if (imageInfo != null && !(TenantId.SYS_TENANT_ID.equals(imageInfo.getTenantId()) && ResourceSubType.SCADA_SYMBOL.equals(imageInfo.getResourceSubType()))) {
                     byte[] data = key.isPreview() ? getImagePreview(tenantId, imageInfo.getId()) : getImageData(tenantId, imageInfo.getId());
                     ImageDescriptor descriptor = getImageDescriptor(imageInfo, key.isPreview());
                     String tbImagePrefix = "";
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/chart/time-series-chart.ts b/ui-ngx/src/app/modules/home/components/widget/lib/chart/time-series-chart.ts
index 9e32fdeea2..11b06ad031 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/chart/time-series-chart.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/chart/time-series-chart.ts
@@ -609,7 +609,7 @@ export class TbTimeSeriesChart {
     echartsModule.init();
     this.renderer.setStyle(this.chartElement, 'letterSpacing', 'normal');
     this.timeSeriesChart = echarts.init(this.chartElement,  null, {
-      renderer: 'canvas'
+      renderer: 'svg'
     });
     this.timeSeriesChartOptions = {
       darkMode: this.darkMode,