steps:
-rename a modular storage (new empty or with a module inside) in an anvil(name changes successfully)
-then place it on cobblestone slabs or next to another module(maybe with any block)
-the name reverts to "Modular Storage"
minecraft 1.10.2
forge 1.10.2-12.18.3.2316
rftools-1.1x-6.13

cheers!