diff --git a/src/components/Chat.vue b/src/components/Chat.vue
index 76de6bc..e11bd68 100644
--- a/src/components/Chat.vue
+++ b/src/components/Chat.vue
@@ -1965,7 +1965,7 @@ export default {
       let eventsToConsider = onlyTheseEvents;
       if (!eventsToConsider) {
         // If events to consider is not given (used by Audio layout) then consider all visible events (with some restrictions).
-        let visibleEventIds = util.findVisibleElements(this.chatContainer).filter(el => el.hasAttribute("eventId")).map(el => el.getAttribute("eventId"));
+        let visibleEventIds = (util.findVisibleElements(this.chatContainer) || []).filter(el => el.hasAttribute("eventId")).map(el => el.getAttribute("eventId"));
 
         eventsToConsider = this.events.filter(e => {
           if (e.getTs() > lastTimestamp &&