SONAR-17390 Fix snippet expansion

server/sonar-web/src/main/js/apps/issues/crossComponentSourceViewer/ComponentSourceSnippetGroupViewer.tsx

             handleSymbolClick={this.handleSymbolClick}
             highlightedLocationMessage={this.props.highlightedLocationMessage}
             highlightedSymbols={this.state.highlightedSymbols}
-            index={index}
+            index={snippets[index].index}
             issue={this.props.issue}
             lastSnippetOfLastGroup={lastSnippetGroup && index === snippets.length - 1}
             loadDuplications={this.loadDuplications}