diff --git a/enjoy/src/renderer/components/messages/assistant-message.tsx b/enjoy/src/renderer/components/messages/assistant-message.tsx
index 31923126..1b4c9488 100644
--- a/enjoy/src/renderer/components/messages/assistant-message.tsx
+++ b/enjoy/src/renderer/components/messages/assistant-message.tsx
@@ -276,7 +276,7 @@ export const AssistantMessageComponent = (props: {
       <Sheet open={shadowing} onOpenChange={(value) => setShadowing(value)}>
         <SheetContent
           side="bottom"
-          className="h-100vh p-0"
+          className="h-screen p-0"
           displayClose={false}
         >
           <SheetHeader className="flex items-center justify-center h-14">
diff --git a/enjoy/src/renderer/hooks/use-transcriptions.tsx b/enjoy/src/renderer/hooks/use-transcriptions.tsx
index 5d53926a..7f28c9df 100644
--- a/enjoy/src/renderer/hooks/use-transcriptions.tsx
+++ b/enjoy/src/renderer/hooks/use-transcriptions.tsx
@@ -117,8 +117,8 @@ export const useTranscriptions = (media: AudioType | VideoType) => {
               sentence.timeline.splice(j, 0, {
                 type: 'token',
                 text: '-',
-                startTime: sentence.timeline[j - 1].endTime,
-                endTime: sentence.timeline[j - 1].endTime,
+                startTime: sentence.timeline[j - 1]?.endTime || 0,
+                endTime: sentence.timeline[j - 1]?.endTime || 0,
                 timeline: [],
               })
               return;