diff --git a/main.js b/main.js
index 094e447..2d4d572 100644
--- a/main.js
+++ b/main.js
@@ -17,6 +17,9 @@ module.exports = class RibbonClasp extends Plugin {
 
   onunload() {
     this.observer?.disconnect();
+    // disconnect doesn't stop an already-scheduled call
+    this.debouncedEnforce?.cancel();
+
     const ribbon = this.getRibbon();
     if (ribbon && this.originalOnChange) {
       ribbon.onChange = this.originalOnChange;