71B MultiMod: MEMORY LOST when changing batteries?

[Dave Britten]

I needed to swap/charge the batteries in my 71B, and upon doing so, got the MEMORY LOST message. I made sure I didn't hit any keys while swapping the batteries. On further experimentation, it seems to happen even with the power jumper removed from the MultiMod. Only when I completely remove the MultiMod from the computer am I able to remove any of the batteries for even a few seconds without losing memory. Is this expected behavior?

I'm pretty uptight about copying everything to my computer via PIL-Box, so I didn't really lose anything, it's just a nuisance.