Backport #29277

dropdown - destroy old popper.js references

js/src/dropdown.js

@@ -436,6 +436,10 @@ class Dropdown {
 
       toggles[i].setAttribute('aria-expanded', 'false')
 
+      if (context._popper) {
+        context._popper.destroy()
+      }
+
       $(dropdownMenu).removeClass(ClassName.SHOW)
       $(parent)
         .removeClass(ClassName.SHOW)