forgetful engines?

Live example tonight have 3 engines running same loop, stopped all and now one doesn't respond. However it follows commands to another.  So I have two engines acting right and one mirrioring another when it shouldn't  

No not normal, but how you configured them to run may be a factor.   Normally this is a battery issue.  I just ran into this yesterday.  Engine reset would not hold data.  It did play shutdown sounds, but stopped short of a complete shutdown.  New battery cleared issue.  So I would try full charging all batteries, but if they are older than 5 for 8.4V or 7 for 2.4V consider changing them.  G

Thank you G, I had chance today to look at the one that was aggravating me the other night.  The battery in it I think was replaced 2 or so years ago but didn't seem real strong.  I put an 9v in to test and ran it around a bit seemed to be ok so I will get a new battery ordered.  

I double checked the other two that are on the track and they do go through the full shutdown/blowdown sequence.  As far as the configuration, they are pretty much left the way the factory program is.

May be that I just don't run them regular enough?  Mine often set for several weeks at a time.  Possible that the batteries get low then just don't get a full charge when I do start them.  Maybe a bcr would be the way to go?