Hunting Horn new Iceborne note

[Laserphaser]

I'm new to Monster Hunter, am playing with keyboard and mouse, and I picked up the hunting horn as my main weapon.
As I understand it, the expansion introduced a new note (the stylized "f"). This note is bound to the same key as "Display Weapon or Slinger Aim (Hold)" or "-(Press)". This means the note can only be played (and this doesn't work super consistently either) directly after another note, otherwise it brings up slinger aim. This is incredibly frustrating.
I have not found a specific setting to rebind this specific note and would love to know whether I'm doing anything wrong or this is working as intended?
Thanks in advance!

[GameSuki]

It's working as inteded. Just spam the button during another attack and you can stop the spam during the new attack move

[JebKerman]

Yep, you have to use it after another note, and it's bound to the slinger aim key.
tbh, with iceborne the slinger key actually became a pretty common input since a lot of weapons can snap shot a slinger burst or use the slinger or its ammo in some manner.

You probably need to make the input earlier if you're finding it inconsistent, make sure you don't allow your hunter settle after the preceding note.

EDIT: And, as stated above, you can spam the button for your next input while the preceding action is playing out.