diff --git a/lib/compat/loadSerializedHyperGraph.ts b/lib/compat/loadSerializedHyperGraph.ts
index a76dded..758c0ff 100644
--- a/lib/compat/loadSerializedHyperGraph.ts
+++ b/lib/compat/loadSerializedHyperGraph.ts
@@ -33,6 +33,25 @@ const isFullObstacleRegion = (
   return netId === undefined || netId === -1
 }
 
+const getParentObstacleIds = (
+  region: SerializedHyperGraph["regions"][number],
+): string[] => {
+  const parentObstacleIds = region.d?._parentObstacleIds
+  if (Array.isArray(parentObstacleIds)) {
+    return parentObstacleIds.filter(
+      (parentObstacleId): parentObstacleId is string =>
+        typeof parentObstacleId === "string" && parentObstacleId.length > 0,
+    )
+  }
+
+  const parentObstacleId = region.d?.parentObstacleId
+  if (typeof parentObstacleId === "string" && parentObstacleId.length > 0) {
+    return [parentObstacleId]
+  }
+
+  return []
+}
+
 const filterObstacleRegions = (serializedHyperGraph: SerializedHyperGraph) => {
   const connectedRegionIds = new Set<string>()
   for (const connection of serializedHyperGraph.connections ?? []) {
@@ -40,12 +59,23 @@ const filterObstacleRegions = (serializedHyperGraph: SerializedHyperGraph) => {
     connectedRegionIds.add(connection.endRegionId)
   }
 
+  const preservedParentObstacleIds = new Set<string>()
+  for (const region of serializedHyperGraph.regions) {
+    if (!connectedRegionIds.has(region.regionId)) continue
+    for (const parentObstacleId of getParentObstacleIds(region)) {
+      preservedParentObstacleIds.add(parentObstacleId)
+    }
+  }
+
   const removedRegionIds = new Set(
     serializedHyperGraph.regions
       .filter(
         (region) =>
           isFullObstacleRegion(region) &&
-          !connectedRegionIds.has(region.regionId),
+          !connectedRegionIds.has(region.regionId) &&
+          !getParentObstacleIds(region).some((parentObstacleId) =>
+            preservedParentObstacleIds.has(parentObstacleId),
+          ),
       )
       .map((region) => region.regionId),
   )
diff --git a/results/run001/sample014/logs.txt b/results/run001/sample014/logs.txt
new file mode 100644
index 0000000..d623403
--- /dev/null
+++ b/results/run001/sample014/logs.txt
@@ -0,0 +1,25 @@
+sample=sample014
+circuitId=018
+status=failed
+duration=0.001s
+
+error=
+Error: Connection "source_trace_69" could not be mapped to route endpoints
+    at <anonymous> (/home/ohmx/Documents/tiny-hypergraph/lib/compat/loadSerializedHyperGraph.ts:454:17)
+    at forEach (native:1:11)
+    at loadSerializedHyperGraph (/home/ohmx/Documents/tiny-hypergraph/lib/compat/loadSerializedHyperGraph.ts:429:23)
+    at getConstructorParams (/home/ohmx/Documents/tiny-hypergraph/lib/section-solver/TinyHyperGraphSectionPipelineSolver.ts:495:39)
+    at _step (/home/ohmx/Documents/tiny-hypergraph/node_modules/@tscircuit/solver-utils/dist/index.js:151:48)
+    at step (/home/ohmx/Documents/tiny-hypergraph/node_modules/@tscircuit/solver-utils/dist/index.js:34:12)
+    at solve (/home/ohmx/Documents/tiny-hypergraph/node_modules/@tscircuit/solver-utils/dist/index.js:68:12)
+    at <anonymous> (/home/ohmx/Documents/tiny-hypergraph/scripts/benchmarking/benchmark.ts:295:22)
+
+snapshotError=
+Error: Connection "source_trace_69" could not be mapped to route endpoints
+    at <anonymous> (/home/ohmx/Documents/tiny-hypergraph/lib/compat/loadSerializedHyperGraph.ts:454:17)
+    at forEach (native:1:11)
+    at loadSerializedHyperGraph (/home/ohmx/Documents/tiny-hypergraph/lib/compat/loadSerializedHyperGraph.ts:429:23)
+    at getInitialVisualizationSolver (/home/ohmx/Documents/tiny-hypergraph/lib/section-solver/TinyHyperGraphSectionPipelineSolver.ts:629:37)
+    at initialVisualize (/home/ohmx/Documents/tiny-hypergraph/lib/section-solver/TinyHyperGraphSectionPipelineSolver.ts:642:17)
+    at getSnapshotPng (/home/ohmx/Documents/tiny-hypergraph/scripts/benchmarking/benchmark.ts:256:22)
+    at <anonymous> (/home/ohmx/Documents/tiny-hypergraph/scripts/benchmarking/benchmark.ts:379:27)
diff --git a/results/run001/sample076/logs.txt b/results/run001/sample076/logs.txt
new file mode 100644
index 0000000..ad02648
--- /dev/null
+++ b/results/run001/sample076/logs.txt
@@ -0,0 +1,15 @@
+sample=sample076
+circuitId=162
+status=failed
+duration=0.009s
+
+error=
+Error: Route 18 is not a single ordered path from 1660 to 823
+    at getOrderedRoutePath (/home/ohmx/Documents/tiny-hypergraph/lib/compat/convertToSerializedHyperGraph.ts:230:17)
+    at getSerializedSolvedRoute (/home/ohmx/Documents/tiny-hypergraph/lib/compat/convertToSerializedHyperGraph.ts:300:48)
+    at map (native:1:11)
+    at convertToSerializedHyperGraph (/home/ohmx/Documents/tiny-hypergraph/lib/compat/convertToSerializedHyperGraph.ts:408:49)
+    at _step (/home/ohmx/Documents/tiny-hypergraph/node_modules/@tscircuit/solver-utils/dist/index.js:137:45)
+    at step (/home/ohmx/Documents/tiny-hypergraph/node_modules/@tscircuit/solver-utils/dist/index.js:34:12)
+    at solve (/home/ohmx/Documents/tiny-hypergraph/node_modules/@tscircuit/solver-utils/dist/index.js:68:12)
+    at <anonymous> (/home/ohmx/Documents/tiny-hypergraph/scripts/benchmarking/benchmark.ts:295:22)
diff --git a/results/run001/sample076/snapshot.png b/results/run001/sample076/snapshot.png
new file mode 100644
index 0000000..d58af68
Binary files /dev/null and b/results/run001/sample076/snapshot.png differ