I've got my weapon skills bound to an assortment of letter keys near WASD, and one of those keys happens to be F, which I also use for Mount Ability 1. Usually this seems to work fine, except with skiffs I find that while I can use every other hotkey on the bar normally, pressing F does nothing and I can only switch to that speed by clicking the skill. I tried switching my keybinds around, so that Mount Ability 1 would be on R, and sure enough that also disabled the hotkey for the corresponding skiff skill. Also, I did notice that this same issue also seemed to apply to the fireworks while spectating the Dragon Bash Moa Race.