Thanks so much for your kindness. I read the thread through and understand the issue. It looks make sense and we do not have a real solution on it. I also download the latest foobar MB plugin, it really helps with more comprehensive error message.
Meanwhile, my workaround is to open a web browser page of MB and search the release on it and copy the MB id of the release, it is quite fast on web page. Then I go to the foobar plugin to search by the MBid. since it only target a specific release, it reduce the interaction between client and MB server, usually I can get the hit in 3 retries.