Loot Table for One-Time nodes

Since the introduction of fixed loot tables I get nothing more than 70 ISO from the easy One-Time Nodes or 100 ISO from the hard ones. Of course it may be just my really, really bad luck, but lasting for over two weeks? So I report this as a technical issue to be solved, cause it looks to me like assigning fixed loot table for these nodes also, that make completely no sense to me.