diff --git a/bases/rsptx/interactives/runestone/hparsons/js/hparsons.js b/bases/rsptx/interactives/runestone/hparsons/js/hparsons.js
index 7a1584bb..2c655c7a 100644
--- a/bases/rsptx/interactives/runestone/hparsons/js/hparsons.js
+++ b/bases/rsptx/interactives/runestone/hparsons/js/hparsons.js
@@ -27,7 +27,7 @@ export default class HParsons extends RunestoneBase {
         this.isBlockGrading = this.parseBooleanAttribute(orig, "data-blockanswer");
         this.language = orig.getAttribute("data-language");
         // Detect math mode
-        if (this.language === undefined && orig.textContent.includes('span class="process-math"')) {
+        if (this.language == null && orig.textContent.includes('span class="process-math"')) {
             this.language = "math";
         }
         if (this.isBlockGrading) {
@@ -131,7 +131,7 @@ export default class HParsons extends RunestoneBase {
         this.hparsonsInput = this.outerDiv.querySelector("micro-parsons");
         this.renderMathInBlocks();
         // Change "code" to "answer" in parsons direction for non-code languages
-        if (this.language === undefined || this.language === "math") {
+        if (this.language == null || this.language === "math") {
             this.outerDiv.querySelectorAll(".hparsons-tip").forEach(el => {
                 if (el.textContent.includes("our code")) {
                     el.textContent = el.textContent.replace("our code", "our answer");
@@ -195,9 +195,12 @@ export default class HParsons extends RunestoneBase {
             });
 
             if (window.MathJax && MathJax.typesetPromise) {
-                MathJax.typesetPromise().then(() => this.simulateSolution());
+                MathJax.typesetPromise([blocks]).then(() => this.simulateSolution());
             }
-        }, 0);
+        }, 100);
+        // Ugly... but there are timing issues with block rendering in microparsons and MathJax
+        // most noticeable if multiple hparsons problems are on the same page
+        // this delay seems to help avoid issues
     }
 
     /*