diff --git a/src/memray/reporters/assets/temporal_flamegraph.js b/src/memray/reporters/assets/temporal_flamegraph.js
index 076307b9bd..9fd131e08d 100644
--- a/src/memray/reporters/assets/temporal_flamegraph.js
+++ b/src/memray/reporters/assets/temporal_flamegraph.js
@@ -17,18 +17,22 @@ import {
 var active_plot = null;
 var current_dimensions = null;
 
-var parent_index_by_child_index = (function () {
-  let ret = new Array(packed_data.nodes.children.length);
+var parent_index_by_child_index = generateParentIndexes(packed_data.nodes);
+var inverted_no_imports_parent_index_by_child_index = inverted
+  ? generateParentIndexes(packed_data.inverted_no_imports_nodes)
+  : null;
+
+function generateParentIndexes(nodes) {
+  let ret = new Array(nodes.children.length);
   console.log("finding parent index for each node");
-  for (const [parentIndex, children] of packed_data.nodes.children.entries()) {
+  for (const [parentIndex, children] of nodes.children.entries()) {
     children.forEach((idx) => (ret[idx] = parentIndex));
   }
   console.assert(ret[0] === undefined, "root node has a parent");
   return ret;
-})();
+}
 
-function generateNodeObjects(packedData) {
-  const { strings, nodes } = packedData;
+function generateNodeObjects(strings, nodes) {
   console.log("constructing nodes");
   const node_objects = nodes.name.map((_, i) => ({
     name: strings[nodes["name"][i]],
@@ -62,18 +66,10 @@ function initTrees(packedData) {
     intervals,
     no_imports_interval_list,
   } = packedData;
-  const flamegraphNodeObjects = generateNodeObjects({
-    strings: strings,
-    nodes: nodes,
-    unique_threads: unique_threads,
-  });
 
+  const flamegraphNodeObjects = generateNodeObjects(strings, nodes);
   const invertedNoImportsNodeObjects = inverted
-    ? generateNodeObjects({
-        strings: strings,
-        nodes: inverted_no_imports_nodes,
-        unique_threads: unique_threads,
-      })
+    ? generateNodeObjects(strings, inverted_no_imports_nodes)
     : null;
 
   flamegraphIntervals = intervals;
@@ -85,11 +81,12 @@ function initTrees(packedData) {
   };
 }
 
-function findHWMAllocations(intervals, node_objects, hwmSnapshot) {
-  if (!node_objects) {
-    return;
-  }
-
+function findHWMAllocations(
+  intervals,
+  node_objects,
+  hwmSnapshot,
+  parent_index_by_child_index
+) {
   intervals.forEach((interval) => {
     let [allocBefore, deallocBefore, nodeIndex, count, bytes] = interval;
 
@@ -106,11 +103,13 @@ function findHWMAllocations(intervals, node_objects, hwmSnapshot) {
   });
 }
 
-function findLeakedAllocations(intervals, node_objects, rangeStart, rangeEnd) {
-  if (!node_objects) {
-    return;
-  }
-
+function findLeakedAllocations(
+  intervals,
+  node_objects,
+  rangeStart,
+  rangeEnd,
+  parent_index_by_child_index
+) {
   intervals.forEach((interval) => {
     let [allocBefore, deallocBefore, nodeIndex, count, bytes] = interval;
 
@@ -194,12 +193,20 @@ function packedDataToTree(packedData, rangeStart, rangeEnd) {
 
     // We could binary search rather than using a linear scan...
     console.log("finding hwm allocations");
-    findHWMAllocations(flamegraphIntervals, flamegraphNodeObjects, hwmSnapshot);
     findHWMAllocations(
-      invertedNoImportsIntervals,
-      invertedNoImportsNodeObjects,
-      hwmSnapshot
+      flamegraphIntervals,
+      flamegraphNodeObjects,
+      hwmSnapshot,
+      parent_index_by_child_index
     );
+    if (inverted) {
+      findHWMAllocations(
+        invertedNoImportsIntervals,
+        invertedNoImportsNodeObjects,
+        hwmSnapshot,
+        inverted_no_imports_parent_index_by_child_index
+      );
+    }
   } else {
     // We could binary search rather than using a linear scan...
     console.log("finding leaked allocations");
@@ -207,26 +214,29 @@ function packedDataToTree(packedData, rangeStart, rangeEnd) {
       flamegraphIntervals,
       flamegraphNodeObjects,
       rangeStart,
-      rangeEnd
-    );
-    findLeakedAllocations(
-      invertedNoImportsIntervals,
-      invertedNoImportsNodeObjects,
-      rangeStart,
-      rangeEnd
+      rangeEnd,
+      parent_index_by_child_index
     );
+    if (inverted) {
+      findLeakedAllocations(
+        invertedNoImportsIntervals,
+        invertedNoImportsNodeObjects,
+        rangeStart,
+        rangeEnd,
+        inverted_no_imports_parent_index_by_child_index
+      );
+    }
   }
 
   flamegraphNodeObjects.forEach((node) => {
     node.children = node.children.filter((node) => node.n_allocations > 0);
   });
 
-  // if(inverted){
-  inverted &&
+  if (inverted) {
     invertedNoImportsNodeObjects.forEach((node) => {
       node.children = node.children.filter((node) => node.n_allocations > 0);
     });
-  // }
+  }
 
   flamegraphData = flamegraphNodeObjects[0];
   invertedNoImportsData = inverted ? invertedNoImportsNodeObjects[0] : null;
@@ -337,7 +347,8 @@ function refreshFlamegraph(event) {
   packedDataToTree(packed_data, idx0, idx1);
 
   data = inverted && hideImports ? invertedNoImportsData : flamegraphData;
-  intervals = inverted && hideImports ? c : flamegraphIntervals;
+  intervals =
+    inverted && hideImports ? invertedNoImportsIntervals : flamegraphIntervals;
 
   console.log("total allocations in range: " + data.n_allocations);
   console.log("total bytes in range: " + data.value);
diff --git a/src/memray/reporters/templates/base.html b/src/memray/reporters/templates/base.html
index 7b57f88fde..949c305a6e 100644
--- a/src/memray/reporters/templates/base.html
+++ b/src/memray/reporters/templates/base.html
@@ -144,7 +144,7 @@ <h5 class="modal-title" id="helpModalLabel">How to interpret {{ kind }} reports<
     const merge_threads = {{ merge_threads|tojson }};
     const memory_records = {{ memory_records|tojson }};
     const inverted = {{ inverted|tojson }};
-    const temporal = packed_data["high_water_mark_by_snapshot"] != null;
+    const temporal = packed_data.intervals != null;
   </script>
   {% endblock scripts %}
 </body>