Carry On is a mod that allows for the player to manually pick up blocks and when picking up a block it interprets the block taken from its space as being broken. When attempting to pick up a block since the break event I am using replaces the existing block in its place as a denied result with another block nothing is picked up and replaces it with the block that was expected instead.

The regular behaviour of my break events:
https://streamable.com/bdn48

Using the block carrying mechanic while the keybind is held:
https://streamable.com/jqrhs

The block being carried at the end is an air block.

I am not sure if this behaviour would qualify as bug for either FxControl or Carry On but I wanted to report it nonetheless.

Shouldn't you not allow the pickup if the break event is denied? Same as when you would try to move bedrock for example?