diff --git a/src/trix/controllers/level_2_input_controller.js b/src/trix/controllers/level_2_input_controller.js
index dc4bf7dc9..65b302157 100644
--- a/src/trix/controllers/level_2_input_controller.js
+++ b/src/trix/controllers/level_2_input_controller.js
@@ -73,6 +73,11 @@ export default class Level2InputController extends InputController {
     beforeinput(event) {
       const handler = this.constructor.inputTypes[event.inputType]
 
+      // Handles bug with Siri dictation on iOS 18+.
+      if (!event.inputType) {
+        this.render()
+      }
+
       if (handler) {
         this.withEvent(event, handler)
         this.scheduleRender()