Cps increase in changing the button for use and place

So this is my first time reporting a bug.
I usually use hotkeys when i go afk at an afk fish farm in my survival game.
A few days ago i downloaded the pre release 8 and it updated today
I was getting ready to go afk and as usual use my space bar for right click.
As soon as i press space with a fishing rod in my hand everything went nuts not sure how much
clicks per second it is but my fishing rod broke in a a matter of seconds.
So i tried the same on left click as soon i hit space facing a mob it goes nuts .
Please let me know if there is any more info that is required i would gladly provide it.
Like i said this is the first time i report a bug.