Bug in Hosted inference API
Hello,I found that when I use the Hosted inference API, there will be some problems.
Some inference results show the entire sentence, but other inference results only show the mask token.
For example the model [uer/roberta-base-word-chinese-cluecorpussmall](https://huggingface.co/uer/roberta-base-word-chinese-cluecorpussmall).
When I input "中国的首都是北[MASK]",the results are:
![image](https://user-images.githubusercontent.com/59219579/109969085-72079800-7d2e-11eb-876a-2f66e0fd23b2.png)
![image](https://user-images.githubusercontent.com/59219579/109969434-dcb8d380-7d2e-11eb-9f15-84b3229f97cb.png)
Thanks

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