请问为什么仅训练edit数据集的时候已经把vit_cond_dropout_prob，text_cond_dropout_prob和vae_cond_dropout_prob设置为0了还是有ce=None的情况呀？

--text_cond_dropout_prob 0. \
  --vae_cond_dropout_prob 0. \
  --vit_cond_dropout_prob 0. \

<img width="728" height="187" alt="Image" src="https://github.com/user-attachments/assets/a166e112-dc17-4fbb-8b34-66a686a46e37" />

<img width="320" height="38" alt="Image" src="https://github.com/user-attachments/assets/c3860660-3328-4df4-846c-1dea8db08155" />