SuperMarioBros | Super Mario Bros edit by cocos creator

I am developing a Super Mario Bros game in Android Studio using Libgdx and so far I have not encountered any errors and the project runs fine. However, when I use category and mask filters from Box2D to "destroy" an object upon collision with a sprite (when Mario jumps and his head hits the brick which results in the brick breaking), although the brick gets "destroyed", Mario can only jump through what used to be the brick, until his head reaches the upper layer of the brick (the top side of the object's square outline). Here are some screenshots:

As you can see, Mario cannot jump higher than the upper faint green line which denotes the top part of the destroyed brick.The collision detection is working fine because the I wrote some code for the log to display "Brick: Collision" if there is a collision detected with the brick, and this comes out positive the first time he collides with the brick - as it should do. Thus my question is raised, why does he not jump higher than the top part of the destroyed brick when he should be able to jump freely as if an object isn't there at all. Currently, he is bounced off the top part of the square so he can't go higher. Here is the relevant code:

Main class: