diff --git a/src/main/java/dev/tr7zw/entityculling/CullTask.java b/src/main/java/dev/tr7zw/entityculling/CullTask.java
index 2f67c11..7482994 100644
--- a/src/main/java/dev/tr7zw/entityculling/CullTask.java
+++ b/src/main/java/dev/tr7zw/entityculling/CullTask.java
@@ -92,7 +92,11 @@ private void cullEntities(Vec3 cameraMC, Vec3d camera) {
                        // less
                        // overhead probably than trying to sync stuff up for no really good reason
             }
-            if (entity == null || !(entity instanceof Cullable)) {
+            if (entity == null) {
+                // assume the iterator is broken, cancel the loop https://github.com/tr7zw/EntityCulling/issues/168
+                break;
+            }
+            if (!(entity instanceof Cullable)) {
                 continue; // Not sure how this could happen outside from mixin screwing up the inject into
                           // Entity
             }
@@ -145,6 +149,10 @@ private void cullBlockEntities(Vec3 cameraMC, Vec3d camera) {
                                // less
                                // overhead probably than trying to sync stuff up for no really good reason
                     }
+                    if (entry == null) {
+                        // assume the iterator is broken, cancel the loop https://github.com/tr7zw/EntityCulling/issues/168
+                        break;
+                    }
                     if (blockEntityWhitelist.contains(entry.getValue().getType())) {
                         continue;
                     }