Mob that breaks blocks causes buggy invisible blocks.

Version 2024.1 (1.20.1 Forge)

I really need help, whenever I make a mob that breaks blocks within a radius, some of the broken blocks have become buggy, as it looks like air, but I can't walk through the block, and when I right-click the air, it turns back into the block it originally was. I really need help to fix this, is there any way I can improve the procedure to make it not buggy.

This is the code I used for the mob to break blocks (It is an on entity tick update procedure)

https://imgur.com/a/U2xibYb

This is what happens to some of the blocks.

https://imgur.com/a/tcGAUaz