diff --git a/builder/doc.html b/builder/doc.html
index da5e87a..bfcdf9b 100644
--- a/builder/doc.html
+++ b/builder/doc.html
@@ -1428,7 +1428,7 @@
     <script type="text/javascript" src="../js/sq2items.js"></script>
     <script type="text/javascript" src="../js/optimize.js"></script>
 
-    <div id="graph_body" class="container-fluid me-4" style="max-width: 95%;">
+    <div id="graph_body" style="max-width: 95%; height: 100vh">
     </div>
     <script src="https://d3js.org/d3.v7.js"></script>
     <script type="text/javascript" src="../js/render_compute_graph.js"></script>
diff --git a/js/computation_graph.js b/js/computation_graph.js
index 283f54a..76b1c2d 100644
--- a/js/computation_graph.js
+++ b/js/computation_graph.js
@@ -93,9 +93,9 @@ class ComputeNode {
         this.inputs.push(parent_node)
         link_name = (link_name !== undefined) ? link_name : parent_node.name;
         this.input_translation.set(parent_node.name, link_name);
-        this.inputs_dirty.set(parent_node.name, parent_node.dirty);
-        if (parent_node.dirty) {
+        if (parent_node.dirty || (parent_node.value === null && !this.fail_cb)) {
             this.inputs_dirty_count += 1;
+            this.inputs_dirty.set(parent_node.name, true);
         }
         parent_node.children.push(this);
         return this;