At certain times B3 (Linux/x64) seems to freeze and become mostly unresponsive. I say mostly, because tool windows will still hide and reappear when the main window loses and gains focus, but it doesn't refresh the window or appear to respond to any other input. Most recently this happened when attempting to start a project build. The only way I've been able to recover is to kill and restart the vs process. After which, I'm able to build normally again.