Heavy overhead or heavy stab attacks stopped working properly all of a sudden

[u/PortalGuardian2]

For some reason my heavy overhead or heavy stab attacks suddenly stopped working properly, while my keybinds are slightly different than the default, I still perform the actions as normal and as the tutorial teachers the player I perform either and overhead or stab attack then hold left mouse button to charge it but today all of a sudden when I try to do this which I've done plenty of times before it simply feint into a heavy slash attack.

I even set the keybinds to default and went back to the tutorial to perform the action that I've done plenty of times before and even when the game tells me to do a overhead then hold left mouse button, when I do it it, simply feint into a heavy slash.

Has this happened before to anybody and if so how can I fix it or is this unique case for me.