disc won't stay behind my pubic bone

I am an experienced cup user and decided to switch to a disc to minimize some labia rubbing/discomfort that happens while exercising.

Anyway, I'm on my second cycle with my June disc and have experienced a lot of leakage. My disc just won't stay tucked behind my pubic bone no matter how I try to insert it or ensure it's there.

My cervix is normal height and not tilted.

Is it the disc? I also ordered the Hello disc and am anxiously awaiting its arrival. Any troubleshooting tips for the Hello?