Shoulder joint popping out?

I’m in the middle of getting tested for hEDS, and I’m just now realizing that some of my ‘normals’ are not so normal. I’m wondering about the shoulder joint right now.. like when I rotate my arm 360, like doing a back stroke while swimming, my shoulder always kinda froze mid rotation, popped out, then continued rotation. I’d always thought that that was normal. My non hypermobile husband doesn’t really understand what I’m talking about, but that could be language difference.