BUG: chat api returning extra comma before \n\n delimiter

Is there a bug right now in GPT-4 api?
I’m experiencing below bug.

preview","system_fingerprint":"fp_f084bcfc79","choices":[{"index":0,"delta":{"content":" as"},"logprobs":null,"finish_reason":null}]},\n\n data: {"id":"chatcmpl-
":null}]},\n\n data: 

How come there is a extra comma before the delimiter(\n\n).?

And not sure if this is related, but I also saw below previously. Any extra comma in the middle of the error code.

"code": "context_lengt,h_exceeded"