blank image issue on multiple req

controller.py

@@ -629,6 +629,9 @@ def groq_chart(csv_url: str, question: str):
             """
             answer = df.chat(question + instructions)
             
+            # Make sure to close figures so they don't conflict between processes
+            plt.close('all')
+            
             # If process_answer indicates a problem, return a failure message.
             if process_answer(answer):
                 return "Chart not generated"
@@ -691,6 +694,9 @@ def langchain_csv_chart(csv_url: str, question: str, chart_required: bool):
             result = agent.invoke({"input": _prompt_generator(question, True)})
             output = result.get("output", "")
 
+            # Close figures to avoid interference
+            plt.close('all')
+
             # Extract chart filenames (assuming extract_chart_filenames returns a list)
             chart_files = extract_chart_filenames(output)
             if len(chart_files) > 0:

intitial_q_handler.py

@@ -4,7 +4,7 @@ INITIAL_CHAT_QUESTIONS = [
 ]
 
 INITIAL_CHART_QUESTIONS = [
-    "Can you provide a visualization of the data?",
+    "Can you provide a bar visualization of the data?",
 ]
 
 def if_initial_chat_question(query: str) -> bool: