HitBox's Box Collider 2D is not following its parent Enemy sprite

Hello there, good day to you all. I have just jumped into Unity from Love2D and facing some problems with HitBox Collider. I have created a HitBox collider for the Enemy Sprite and animated it so that it follows the enemy(frame by frame) while attacking the player. In Animation panel, on playing the animation i get the result(as shown below):

But, when i start the game it is giving a weird behaviour(as shown below).

But for my Player (on playing the game) it is working just fine.

I have tried to Curves > Both Tangents > Constant (for all frames in Animation Panel) as someone was suggesting it but it didn't work for me.