diff --git a/packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-panel-input.ts b/packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-panel-input.ts
index abdbb748f..6aac1f20d 100644
--- a/packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-panel-input.ts
+++ b/packages/frontend/core/src/blocksuite/presets/ai/chat-panel/chat-panel-input.ts
@@ -423,6 +423,7 @@ export class ChatPanelInput extends WithDisposable(LitElement) {
     const { doc } = this.host;
     this.textarea.value = '';
     this.isInputEmpty = true;
+    this.textarea.style.height = 'unset';
     this.updateContext({
       images: [],
       status: 'loading',