Don't set the markdown cell height based on the height

src/vs/workbench/contrib/notebook/browser/view/renderers/cellRenderer.ts

@@ -414,7 +414,10 @@ export class MarkdownCellRenderer extends AbstractCellRenderer implements IListR
 			templateData.cellContainer.appendChild(renderedHTML);
 		}
 
-		if (height) {
+		if (height === undefined) {
+			return;
+		}
+
 		const elementDisposables = templateData.elementDisposables;
 
 		elementDisposables.add(new CellContextKeyManager(templateData.contextKeyService, this.notebookEditor.viewModel?.notebookDocument!, element));
@@ -435,11 +438,8 @@ export class MarkdownCellRenderer extends AbstractCellRenderer implements IListR
 		elementDisposables.add(this.editorOptions.onDidChange(newValue => markdownCell.updateEditorOptions(newValue)));
 		elementDisposables.add(markdownCell);
 
-			element.totalHeight = height;
-
 		templateData.languageStatusBarItem.update(element, this.notebookEditor);
 	}
-	}
 
 	disposeTemplate(templateData: MarkdownCellRenderTemplate): void {
 		templateData.disposables.clear();