text: Title: ValueError: Cannot process this value as an Image, it is of type: <class 'tuple'>
  Body: ### Describe the bug
  
  Tried gr.load("models/black-forest-labs/FLUX.1-schnell").launch() and sometimes it throws this error. It is not consistent as sometimes it generates the image and sometimes throws this error. I tried both in a local docker container and huggingface private space.
  
  gradio==5.6.0
  gradio_client==1.4.3
  
  Traceback (most recent call last):
    File "/usr/local/lib/python3.10/site-packages/gradio/queueing.py", line 624, in process_events
      response = await route_utils.call_process_api(
    File "/usr/local/lib/python3.10/site-packages/gradio/route_utils.py", line 323, in call_process_api
      output = await app.get_blocks().process_api(
    File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 2028, in process_api
      data = await self.postprocess_data(block_fn, result["prediction"], state)
    File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 1834, in postprocess_data
      prediction_value = block.postprocess(prediction_value)
    File "/usr/local/lib/python3.10/site-packages/gradio/components/image.py", line 279, in postprocess
      saved = image_utils.save_image(value, self.GRADIO_CACHE, self.format)
    File "/usr/local/lib/python3.10/site-packages/gradio/image_utils.py", line 76, in save_image
      raise ValueError(
  ValueError: Cannot process this value as an Image, it is of type: <class 'tuple'>
  
  ### Have you searched existing issues?  🔎
  
  - [X] I have searched and found no existing issues
  
  ### Reproduction
  
  ```python
  import gradio as gr
  gr.load("models/black-forest-labs/FLUX.1-schnell").launch() 
  ```
  
  
  ### Screenshot
  
  <img width="786" alt="image" src="https://github.com/user-attachments/assets/b59938a0-b666-4975-a1bc-599134a79617">
  
  
  ### Logs
  
  ```shell
  Traceback (most recent call last):
    File "/usr/local/lib/python3.10/site-packages/gradio/queueing.py", line 624, in process_events
      response = await route_utils.call_process_api(
    File "/usr/local/lib/python3.10/site-packages/gradio/route_utils.py", line 323, in call_process_api
      output = await app.get_blocks().process_api(
    File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 2028, in process_api
      data = await self.postprocess_data(block_fn, result["prediction"], state)
    File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 1834, in postprocess_data
      prediction_value = block.postprocess(prediction_value)
    File "/usr/local/lib/python3.10/site-packages/gradio/components/image.py", line 279, in postprocess
      saved = image_utils.save_image(value, self.GRADIO_CACHE, self.format)
    File "/usr/local/lib/python3.10/site-packages/gradio/image_utils.py", line 76, in save_image
      raise ValueError(
  ValueError: Cannot process this value as an Image, it is of type: <class 'tuple'>
  ```
  
  
  ### System Info
  
  ```shell
  gradio==5.6.0
  gradio_client==1.4.3
  ```
  
  
  ### Severity
  
  Blocking usage of gradio