I've found 2 bugs when we spectate someone.
1. When you have binoculars and you spectate someone. If you use your binoculars, the screens will zoom but not the item in the hand of the player and sometimes it makes weird things...
2. When you use an Intersect command and you add [display]
Intersect [ray] [vrel:0,0,0] [vrel:10,0,0] [players] [display]
I know, loop make something like a spider web but when you spectate someone, you see the whites lines in the screens of this player (but the player don't see this lines) and when you move it move in the screen of the player.