diff --git a/packages/client/src/components/preview/IndicatorSet.svelte b/packages/client/src/components/preview/IndicatorSet.svelte
index dfea20a45f..4af1224622 100644
--- a/packages/client/src/components/preview/IndicatorSet.svelte
+++ b/packages/client/src/components/preview/IndicatorSet.svelte
@@ -67,14 +67,14 @@
   }
 
   const createIntersectionCallback = idx => entries => {
-    if (callbackCount >= observers.length) {
+    if (callbackCount >= intersectionObservers.length) {
       return
     }
     nextState.indicators[idx].visible =
       nextState.indicators[idx].insideModal ||
       nextState.indicators[idx].insideSidePanel ||
       entries[0].isIntersecting
-    if (++callbackCount === observers.length) {
+    if (++callbackCount === intersectionObservers.length) {
       state = nextState
       updating = false
     }