fix(contour): should not display on stack viewport

packages/tools/src/tools/displayTools/Contour/contourDisplay.ts

@@ -2,6 +2,7 @@ import {
   getEnabledElementByIds,
   Types,
   utilities as csUtils,
+  StackViewport,
 } from '@cornerstonejs/core';
 
 import Representations from '../../../enums/SegmentationRepresentations';
@@ -128,6 +129,13 @@ async function render(
   const contourData = segmentation.representationData[Representations.Contour];
   const { geometryIds } = contourData;
 
+
+  // We don't have a good way to handle stack viewports for contours at the moment.
+  // Plus, if we add a segmentation to one viewport, it gets added to all the viewports in the toolGroup too.
+  if (viewport instanceof StackViewport) {
+    return;
+  }
+
   if (!geometryIds?.length) {
     console.warn(
       `No contours found for segmentationId ${segmentationId}. Skipping render.`