Typical isn't it? At least my problem is only appearing with beginners that don't know yet that there is CBM and CM. So we will sort it out with time. But this Lernea Hydra appears many times, especially in BR.
So, update on this. I mentioned it to the group and the ladies understood the problem. One solved it immediately by rotating her body correctly. Others had still difficulties but they got it when dancing in double hold. But we agreed not to go into double hold at the start of the enchufla. Instead we will work on the problem directly. So I would say issue "pending".
First connection with the floor, that enables the one on the right to have CM while the lady on the left is sliping. Second straightening of the knees by the lady on the right which means better hip action. The lady on the left has bent knees all the time. I think we better stop there.