Hip clicking/catching

In the Middle stretch series, in the supine flairs, When I attempt to do a large circle going through middle split, my hips catch and cause pain until it releases. In order to get it not to catch, I have to keep it at an extremely small angle - I can go out wide into a 'split' but when one leg is up, and the other should end close to the floor, I have to keep mine within about a 20 degree angle, otherwise I get the catch in my hips. I end up doing a very long and narrow Oval. Any suggestions on how to work with this, or what might be going on. Thanks!

Just FYI... I'm about 2 months into the stretch series. 37 y.o. Female. Thanks!

HI Jeremy, what's happen if you try to do the movement one leg at time?

It still catches at the bottom. I can make it about 85% of the way from the top to the 'bottom' of the arc, and it catches and pops or releases. 

At his point I suggest you to check the opinion of a physio for sure. let him know the sensation and show him/her the movement.

Thanks, Alessandro. I appreciate your help