Anyone else seeing that some datamonitors don't start automatically after manager restart?

We have noticed that whenever we restart the manager service (or reboot the entire esm) that some data monitors don't start up automatically.  They show as running, but they arent collecting any data.  If we stop then start the datamonitor then they work fine.  It's only a few of them that we see this happen with (or at least that we have found so far).  I was curious to see if anyone else had seem similar behaviors?  (We are running ESM 6.5cP1) !