当JS解析时，PHP json_encode有时会丢失它的最后一个'}'括号

I'm facing an issue when use PHP json_encode function. Sometimes, the encoded JSON lost } bracket at the end of JSON, but sometimes it's not.

The PHP code:

$json = json_encode([
  'type' => 'news',
  'status' => $status, // string
  'data' => $news, // array of data
], JSON_UNESCAPED_UNICODE|JSON_UNESCAPED_SLASHES);

The data contains Chinese characters. I used fetch on JS to request the JSON and when it parsed the JSON, it returned a parse error message as unexpected end of JSON input.

Here's what does the JSON looks like:
It lost <code>}</code> at the end

What's going wrong here???

I am not able to add a comment here. But it seems to me, encoding is not utf-8. You can convert the encoding using mb_convert_encoding