I think its becouse animation have something wich makes it remove the normal roblox animations and you can change it I don’t know what its called, but try to look into that. Btw i don’t see anythinhg wrong with your animation.
I’m not sure what you mean by removing the normal animations, please tell if you find the name
If you look at the characters left arm in-game, you can see that it doesn’t move like it’s supposed to. Another thing is the right hand, which is supposed to quickly rotate so the sword gets outstretched, which I’m very unsure how that part of the rig can get messed up…