Response featuring code throws TypeError: Attempted to assign to readonly property

I deployed azure chat locally following the docs.
I asked the question: "Imagine you are a python programmer. I want to use shell sort to sort a list of names. Can you provide a concise and fast algorithm to do it."

The response seemed to come back but the template failed to render it, possibly something about wrapping the answer in a code block:

Unhandled Runtime Error
TypeError: Attempted to assign to readonly property.
Source
components/chat/chat-row.tsx (107:18) @ code

105 | }
106 |

107 | children[0] = (children[0] as string).replace("▍", "▍");
|^
108 | }
109 |
110 | const match = /language-(\w+)/.exec(className || "");

TypeError: Cannot assign to read only property '0' of string 'sort()'

Start in components/chat/chat-row.tsx at line 107 and reproduce the reported response containing a shell-sort code block. Inspect how the code response is handled around children[0], then verify that the template renders code responses without the readonly-property TypeError.