Rumpelstiltskin problem
A problem researching things. It's often difficult to find information about peculiar things, when you don't know the name of it, but, once you got the name, it's easy to find the information you're looking for.
I call this issue with researching things the Rumpelstiltskin problem. Once you have the name, you have the power to understand it. Until then, it has power over you.