Importing FBX animation breaks on custom blender rig

What I want to achieve

I have a custom rig that I made in Blender. I imported the rig into roblox and that works great. I have another Blender file that contains the animations, and I am exporting each animation as a separate FBX file. For every animation, I am only trying to export the rig, and not the character mesh.

What my problem is

My problem is when I use the Import > From FBX Animation, the animation looks very wrong.

❌ (without the mesh in the animation FBX)
✅ (with the mesh in the animation FBX)

My current workaround

I managed to find out that this can be “fixed” by exporting the animations with the mesh aswell. BUT, the problem with this is that when I use the From FBX Animation, it uploads all the meshes and stores them on my roblox account, this clogs up my meshes, and I don’t really want that.

Extra details

These are my settings that I am using to export my animations


(the 0.04 scale, is actually 0.03571, which is the conversion from meters to studs)

Please help

If anybody has a solution, please share. Thank you!