net::ERR_HTTP2_PROTOCOL_ERROR 200 (OK) and abortController don't work

```
const abortController = new AbortController()
await fetchEventSource(
`https://xxx/xx/xx/xx?query=${questionSended}&dialog_id=${this.currentDialogID}&is_stream=1`,
{
headers: {
Authorization: userinfo.token
},
signal: abortController.signal,
openWhenHidden: true,
onopen: async response => {
console.log('onopen', response)
if (response.status !== 200) {
throw new Error(`${response.status}(${response.statusText})`)
}
return
},
onmessage: res => {
const data = JSON.parse(res.data)
console.log(data)
if (data.plugin_id) return
if (data.error_code) {
throw new Error(`${data.error_code}(${data.error_msg})`)
}
if (data.prompt) {
this.relatedQuestion = data.prompt
} else {

}
},
onclose: () => {
console.log('closed')
},
onerror: err => {
console.log('err', err)
if (abortController.signal.aborted) return
this.dialogDetailList[contextIndex].answer =
'error'
abortController.abort()
}
}
)

```
The error occured in the middle of request, and the browser start another request to continue receiving stream data. And the same error occured. such back and forth
And l can read true value of 'abortController.signal.aborted' in error callback, but the request still continue