Test Execute: "Network error. Probably, the remote application has been terminated."

I have a set of VM's with Test Execute that I use distributed testing on.  The master VM executes a distributed testing project and sends the tests to other VM's to run on multiple browsers.  Lately, I have been executing the tests on the master VM, and then opening the slave VM in RDC and watching the tests execute (nice to see them running).  After the tests are over, I see the log files appear in IE on the slave machine, but TE keeps running (as indicated by the pause/stop button on the upper right corner) on the master VM.  After some time, I click the Stop button, and the log file that appears on the master VM says "Network error. Probably, the remote application has been terminated."  What's going on here?  I expected A) TE to exit when the tests stop (as I saw them run) and B) the test log files to appear after that on the master VM, not the slave.  Thanks!