No wind on (some) instanced foliage


I’ve come across an issue I’m not sure how to fix. I have foliage in a scene, and two of the grass instances don’t have any wind. There’s a few other things to mention:

1- When adding the grass mesh directly to the scene wind is applied (it’s only the instances that don’t have wind).
2- The mesh and material is properly set up (I’ve done some extensive investigating to make sure).
3- There is no wind when applying another material that shows wind on other foliage
4- The instanced foliage does have wind when brought into another level.

Does anyone have any suggestions? I’m thinking this is some weird and magical bug. Thank you for your time