I use Bloody A4Tech V8M mouse which has programmable buttons. I have assigned one of them to CTRL key. But I cannot activate 'Tempest Strike' using this button. Pressing CTRL on my keyboard activates that ability correctly. I attached a video this this issue. In the game CTRL is assigned to 'Squatting' with holding (I mean, while I am holding CTRL, my guardian moves slowly and sneaky).