diff --git a/index.html b/index.html
index b824bc8..5a7ee23 100644
--- a/index.html
+++ b/index.html
@@ -1872,6 +1872,9 @@ <h4>Operations</h4>
                 If the key data of |key| represents an invalid point or a small-order element
                 on the Elliptic Curve of Ed25519, return `false`.
               </p>
+              <p class="issue" data-number="27">
+                Not all implementations perform this check.
+              </p>
             </li>
             <li>
               <p>
@@ -1879,6 +1882,9 @@ <h4>Operations</h4>
                 represents an invalid point or a small-order element
                 on the Elliptic Curve of Ed25519, return `false`.
               </p>
+              <p class="issue" data-number="27">
+                Not all implementations perform this check.
+              </p>
             </li>
             <li>
               <p>
@@ -2765,6 +2771,9 @@ <h4>Operations</h4>
                 If the key data of |key| represents an invalid point or a small-order element
                 on the Elliptic Curve of Ed448, return `false`.
               </p>
+              <p class="issue" data-number="27">
+                Not all implementations perform this check.
+              </p>
             </li>
             <li>
               <p>
@@ -2772,6 +2781,9 @@ <h4>Operations</h4>
                 represents an invalid point or a small-order element
                 on the Elliptic Curve of Ed448, return `false`.
               </p>
+              <p class="issue" data-number="27">
+                Not all implementations perform this check.
+              </p>
             </li>
             <li>
               <p>