Unable to break blocks in creative mode

Whenever I am in creative mdoe and try to break a block,the block does not break. For a few seconds,the hitbox of the block disappears and I'm able to move through it,but,after that the hitbox of the block reappears and it is like the block was never broken. This only happens when I try to break the block once, if I continuously try to break the block,it will break eventually