We see that from time to time too.
But we didn't have the supervisor reboot their pc - all they needed to do is close the real time display, wait a few seconds and relaunch the display. On a rare occassion we had to close the display and relaunch it more than once, but this is all it usually takes.
On your Web Application Server, you can try increasing the OAM timeout in the RTR Registry Setting from 10000ms in increments of 10000 until Agent Names are displayed. I set mine to 20000 and it seems to work better.