IGHJ5*01 and IGHJ5*02 are equally good. Without #3414
we can have either sequences.

Alignment:
read             gactactggggccagggaaccctggtcaccgtctcctcag
IGHJ4*01   8     ..............A.........................
IGHJ4*02   8     ........................................
IGHJ4*02   8     ..............A..G......................
IGHJ5*01  11     ....C.........A.........................
IGHJ5*02  11     ...CC...................................