fix #90199

src/vs/workbench/browser/parts/views/customView.ts

@@ -767,6 +767,7 @@ class TreeRenderer extends Disposable implements ITreeRenderer<ITreeItem, FuzzyS
 				iconClass = ThemeIcon.asClassName(node.themeIcon);
 			}
 			templateData.icon.className = iconClass ? `custom-view-tree-node-item-icon ${iconClass}` : '';
+			templateData.icon.style.backgroundImage = '';
 		}
 
 		templateData.actionBar.context = <TreeViewItemHandleArg>{ $treeViewId: this.treeViewId, $treeItemHandle: node.handle };