>>73068989NTA, but just because they informed their manager doesn't mean said manager would have been able to predict that there might be major issue with the stream. After all, even if you don't want to talk about Bae, several other EN members have been able to stream while being in JP with minimal issue.
Complaining about their manager or Cover is silly - if you need extra help with a basic task (yes, streaming is their basic task), you should ask for it.