scampywiak: Don't know if this should be considered a bug, but in brewing potions we have to wait a few seconds between each one, ie; you can't just tap the key repeatedly, it doesn't respond to each tap. Highly annoying.
I don't think it's a bug, but it might be related to the game not having hardware mouse programmed in, which makes pretty much all mouse actions feel a bit sluggish.
I've no idea whether or not CDPR will add hardware mouse in the future, but try installing
Panel Tweaks in the meantime. It's a real lifesaver when it comes to anything inventory-related. It allows you to brew potions and make bombs in bulk, for example. :)