diff --git a/src/hooks/useSubmit.ts b/src/hooks/useSubmit.ts
index e33f94a..87aab05 100644
--- a/src/hooks/useSubmit.ts
+++ b/src/hooks/useSubmit.ts
@@ -53,6 +53,10 @@ const useSubmit = () => {
       }
 
       if (stream) {
+        if (stream.locked)
+          throw new Error(
+            'Oops, the stream is locked right now. Please try again'
+          );
         const reader = stream.getReader();
         let reading = true;
         while (reading && useStore.getState().generating) {
@@ -80,6 +84,11 @@ const useSubmit = () => {
             setChats(updatedChats);
           }
         }
+        if (useStore.getState().generating) {
+          reader.cancel('Cancelled by user');
+        } else {
+          reader.cancel('Generation completed');
+        }
       }
     } catch (e: unknown) {
       const err = (e as Error).message;
diff --git a/src/utils/countTokens.ts b/src/utils/countTokens.ts
index cf4c92d..ac5e4af 100644
--- a/src/utils/countTokens.ts
+++ b/src/utils/countTokens.ts
@@ -50369,7 +50369,7 @@ const bpe_ranks = dictZip(bpe_merges, range(0, bpe_merges.length));
 const cache = {};
 
 const bpe = (token) => {
-  if (Object.hasOwn(cache, token)) {
+  if (cache.hasOwnProperty(token)) {
     return cache[token];
   }
 
@@ -50397,7 +50397,7 @@ const bpe = (token) => {
         )
       ];
 
-    if (!Object.hasOwn(bpe_ranks, bigram)) {
+    if (!bpe_ranks.hasOwnProperty(bigram)) {
       break;
     }