I was attempting to play through the tutorial and got stuck at the part where I'm supposed to use a grenade to blow up a barricade... so like five minutes in. Pressing RMB to "charge" the grenade does nothing. And there's an orange arrow pointing down at nothing on the UI. Like it's pointing in between two buttons. I clicked on the blinking grenade button probably 100 times. Then Tried right clicking it, middle mouse button... Nothing worked. I pressed 5 a bunch of times. Nothing. So I figured it was probably a bug and decided to start a game. That orange arrow pointing at nothing was still there when my new game started (LOL). Is this normal?