Hip Pain during RDLs

So when I do Romanian Deadlifts, my hips feel some type of way.  I can't quite describe it, it's just discomfort, that's about as descriptive as I can getIt seems to be between the middle of my hip flexors and my hip abductors (on my right leg), I've found that when I really soften (bend) the knees a lot more in the movement, the pain is gone, but I don't think I can truly call it an RDL if I knees are too far from straight.  Has anyone else ever had this experience? Anyone know why? Any insight is appreciated.