FBX Animation export muddles around keyframes

I’m currently trying to export a tracked animation into Roblox from Blender as seen here:

The issue is that when using the “Import From FBX Animation” option in Roblox, the animation comes out like this:

I have no clue what’s causing this, the rig itself imported fine:

Can someone help me out with this? It’s becoming a great annoyance.