I want that species so badly!! I didn’t realize they did so poorly in captivity, though. 
The few species I’ve kept have done well so far, but it sounds like Yellow Pandas are out of my league. 
Does anyone happen to know if the Merulanella ‘Ember Bee’ is any easier? I had my heart set on keeping one or the other, so I hope the Ember Bees aren’t quite as tough! 
I did develop a hypothesis about why isopods colonies may crash (in addition to the buildup of waste in the container over time). With the more expensive species of isopods, we often buy 5-10 animals to start with for financial reasons. But that means the whole colony has very little genetic diversity. When I decided I wanted to try ‘Panda Kings,’ I did a little (expensive) experiment. I bought small quantities of Panda Kings from 3 different sources. Lo and behold- they are thriving thus far. I’ll have to wait and see how they do longer-term, but I suspect the increased genetic diversity will positively contribute to the health of my colony.