Platform enemy stuck in floor

So i am creating a platformer and so far everything works as it should. however ONE particular enemy type is stuck in the floor. It moves left and right as it shold, does damage and everyhting but it falls through the first floor tile and then keeps walking in the floor, just its height under the floor. no clue why.

i checked the origin and it fits, double and triple checked the funcitons, its the same funciton as anothr enemy that works flawlessly, no clue what it could be.

help, please?

Can you post the project? It would be easier to find the issue if we could see it happen.

What about the collision polygon or if it have many frames check the other frames image point.

I checked all image and origin points as well as the collision polygon - and that was the problem. THe Polygon was messed up in a few frames so ther we have it. Thanks for the Help