diff --git a/.github/workflows/Automated Test (full).yml b/.github/workflows/Automated Test (full).yml
index cc81b62..3fc879a 100644
--- a/.github/workflows/Automated Test (full).yml	
+++ b/.github/workflows/Automated Test (full).yml	
@@ -53,7 +53,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v2
         with:
-          node-version: '14'
+          node-version: '15'
       - name: Cache modules psychojs_testing
         uses: actions/cache@v2
         env:
diff --git a/.github/workflows/Automated Test (short).yml b/.github/workflows/Automated Test (short).yml
index 7d6001b..8d25449 100644
--- a/.github/workflows/Automated Test (short).yml	
+++ b/.github/workflows/Automated Test (short).yml	
@@ -45,7 +45,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v1
         with:
-          node-version: '12'
+          node-version: '15'
           
       # START: install psychojs_testing
       - name: Checkout psychojs_testing
diff --git a/package.json b/package.json
index 8c7e2cb..34213e9 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "pixi.js-legacy": "^6.0.4",
     "seedrandom": "^3.0.5",
     "tone": "^14.7.77",
-    "xlsx": "^0.17.0"
+    "xlsx": "^0.18.5"
   },
   "devDependencies": {
     "csslint": "^1.0.5",
diff --git a/src/util/Util.js b/src/util/Util.js
index 0845207..eba7e48 100644
--- a/src/util/Util.js
+++ b/src/util/Util.js
@@ -362,6 +362,24 @@ export function shuffle(array, randomNumberGenerator = undefined, startIndex = u
 	return array;
 }
 
+/**
+ * linspace
+ *
+ * @name module:util.linspace
+ * @function
+ * @public
+ * @param {Object[]} startValue, stopValue, cardinality
+ * @return {Object[]} an array from startValue to stopValue with cardinality steps
+ */
+export function linspace(startValue, stopValue, cardinality) {
+  var arr = [];
+  var step = (stopValue - startValue) / (cardinality - 1);
+  for (var i = 0; i < cardinality; i++) {
+    arr.push(startValue + (step * i));
+  }
+  return arr;
+}
+
 /**
  * Pick a random value from an array, uses `util.shuffle` to shuffle the array and returns the last value.
  *
diff --git a/src/visual/ShapeStim.js b/src/visual/ShapeStim.js
index 49b1049..307ff8e 100644
--- a/src/visual/ShapeStim.js
+++ b/src/visual/ShapeStim.js
@@ -385,4 +385,29 @@ ShapeStim.KnownShapes = {
 		[-0.39, 0.31],
 		[-0.09, 0.18],
 	],
+
+	triangle: [
+        [+0.0, 0.5],  // Point
+        [-0.5, -0.5],  // Bottom left
+        [+0.5, -0.5],  // Bottom right
+    ],
+
+	rectangle: [
+			[-.5,  .5],  // Top left
+			[ .5,  .5],  // Top right
+			[ .5, -.5],  // Bottom left
+			[-.5, -.5],  // Bottom right
+	],
+
+	arrow: [
+			[0.0, 0.5],
+			[-0.5, 0.0],
+			[-1/6, 0.0],
+			[-1/6, -0.5],
+			[1/6, -0.5],
+			[1/6, 0.0],
+			[0.5, 0.0],
+	],
 };
+// Alias some names for convenience
+ShapeStim.KnownShapes['star'] = ShapeStim.KnownShapes['star7']
diff --git a/src/visual/Survey.js b/src/visual/Survey.js
index b573e16..57bf41f 100644
--- a/src/visual/Survey.js
+++ b/src/visual/Survey.js
@@ -82,6 +82,10 @@ export class Survey extends VisualStim
 	{
 		super({ name, win, units, ori, depth, pos, size, autoDraw, autoLog });
 
+		// Storing all existing signaturePad questions to properly handle their resize.
+		// Unfortunately signaturepad question type can't handle resizing properly by itself.
+		this._signaturePads = [];
+
 		// whether the user is done with the survey, independently of whether the survey is completed:
 		this.isFinished = false;
 
@@ -968,8 +972,6 @@ export class Survey extends VisualStim
 			this.psychoJS.logger.warn(`Flag _isCompletedAll is false!`);
 		}
 
-		this._detachResizeObservers();
-
 		this._surveyRunningPromiseResolve(completionCode);
 	}
 
@@ -1137,34 +1139,46 @@ export class Survey extends VisualStim
 		this._lastPageSwitchHandledIdx = -1;
 	}
 
-	_handleSignaturePadResize(entries)
+	_handleWindowResize(e)
 	{
-		for (let i = 0; i < entries.length; i++)
+		if (this._surveyModel)
 		{
-			// const signatureCanvas = entries[i].target.querySelector("canvas");
-			const question = this._surveyModel.getQuestionByName(entries[i].target.dataset.name);
-			question.signatureWidth = Math.min(question.maxSignatureWidth, entries[i].contentBoxSize[0].inlineSize);
+			for (let i = this._signaturePads.length - 1; i >= 0; i--)
+			{
+				// As of writing this (24.03.2023). SurveyJS doesn't have a proper event
+				// for question being removed from nested locations, such as dynamic panel.
+				// However, surveyJS will set .signaturePad property to null once the question is removed.
+				// Utilising this knowledge to sync our lists.
+				if (this._signaturePads[ i ].question.signaturePad)
+				{
+					this._signaturePads[ i ].question.signatureWidth = Math.min(
+						this._signaturePads[i].question.maxSignatureWidth,
+						this._signaturePads[ i ].htmlElement.getBoundingClientRect().width
+					);
+				}
+				else
+				{
+					// Signature pad was removed. Syncing list.
+					this._signaturePads.splice(i, 1);
+				}
+			}
 		}
 	}
 
 	_addEventListeners()
 	{
-		this._signaturePadRO = new ResizeObserver(this._handleSignaturePadResize.bind(this));
+		window.addEventListener("resize", (e) => this._handleWindowResize(e));
 	}
 
 	_handleAfterQuestionRender (sender, options)
 	{
 		if (options.question.getType() === "signaturepad")
 		{
-			this._signaturePadRO.observe(options.htmlElement);
+			this._signaturePads.push(options);
+			options.question.signatureWidth = Math.min(options.question.maxSignatureWidth, options.htmlElement.getBoundingClientRect().width);
 		}
 	}
 
-	_detachResizeObservers()
-	{
-		this._signaturePadRO.disconnect();
-	}
-
 	/**
 	 * Init the SurveyJS.io library and various extensions, setup the theme.
 	 *