Gpt 4 and 4o both have responses disappearing as they are being sent

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This is just one small example, but the responses for code start being typed out, but then code is deleted as the response forms. Sometimes it just adds in random words or letters places that make no sense and half of its responses are unfinished.

I have tried turning the memory feature off, erasing all old conversations, etc. The quality seems to get worse and worse in the conversation and the responses are unusable.