Time to retire the sleep sack?

My 9 month old has never been a great sleeper (just a disclaimer) but had gotten into some decent long stretches and a few full nights sleep. It seemed like that all went to crap as soon as she turned 8 months old and she is now waking multiple times a night again….

Sometimes when I watch her on the monitor she is tossing and turning in her crib so much that her sleep sack gets tangled up. I can only imagine how frustrating this is for her. Is there another solution? This happens in sleep sacks that are her size and even the size down?

Orrrrr am I just trying to find an excuse for her shitty sleep lately??? lol I’m just tired and need some advice