[plt-scheme] REPL getting disconnected from the editor contents?

Do any of you ever notice that once in a while the repl will get
"disconnected" from the contents of the editor? This has happened to
me perhaps once for every few hours that I've used DrS.

What happens is that you click the run button and the repl resets, but
the contents of the editor are not available to the repl. I'm not sure
how to reproduce this right now, but I do know that restarting DrS
fixes this.