Go to Help>Logging and "report problem". Then reset log and if problem happens again create a new log (and attach the second log to your post). The reason for the second log is most likely it will be smaller (after reset log) and easier to find the issue.
Also if you are using RO+HQ setting, try the RO-STD setting - the more details on what your settings are (audio and video), and when MC fails and when it doesn't, the more help it will be.