I have this problem. In my assembly filtered components in derived pattern does not appears in "feature manager design tree", but appears in graphic area. This component (Parallel pin ISO 2338) is mated in subassembly. This subassembly is mated in main assembly and derived patterned 3 times in main assembly.
SW 2011 x64 SP5.0. Win 7 Professional 64-bit, NVIDIA Quadro 2000, driver 220.127.116.1157.
It is a bug? Thank You.