If you import fbx files into a new project in Blender, just change animation frames length to 150 in timeline and everything will work fine.
Viewing post in Low Poly FPS Starter Kit v1.1 comments
It won't make a difference. I tested the 2 files, the unity project and the separate files, and both worked normally when I exported from blender. I also tried exporting them again and when I opened them they were working the same. I really don't know what's going on in your case. Unfortunately I can't help you. Sorry.