Bebop cannot selfcast the new hook if you're using "Hold to selfcast" function.

[pilovinas]

So I have changed my self cast to be done through holding the ability or item key, this is an option that is in the game. And it works for pretty much everything, including even Bebop bomb (which the normal selfcast function didn't work for by the way), but now with the new self cast to hook allies, I cannot hook allies because I cannot "Hold" the hook ability before it gets cast, since it gets cast the very moment I press down my ability key.

I can confirm the hold to selfcast still works with everything nad there are very annoying workarounds for this. If you hold the hook button down while it's on cooldown, the moment it comes up it will actually selfcast allowing you to hook allies. You can also buffer it while doing actions that prevent casting like melee -> Hold hook lets you Hold Selfcast the hook.

I am no developer or programmer but I feel like the simplest solution would be to have instant cast abilities like Hook to cast on release of the button, allowing for selfcast functionality to have time to detect the holding:
Either the user presses and releases the button, allowing for normal cast and almost indistinguishable from on press down cast

Or the user deliberately holds down the button and after like .5 sec (or whatever the detection for "held down key" is) it casts Selfcasted hook.