phaser 3 animation sinks into ground

[Stahlos]

Hello,

as you can see, I have a spritesheet with different animation states (eg: idle, attack, walk).

The problem is that the attack frames have different sizes as you can see on the image below (marked red).
When I run the animation the character sinks into the ground when it reaches the red marked frames.
How can I prevent this? I barely find useful information about this problem when I search it up... I hope u can help me and understand my question (not native speaking). 

Greetings

[AlgoGames]

Can you not make all frames of same size? Just add blank space on top and right for smaller frames and everything should fall in line.