From testing I have learned that Shroud's shroud is quite inconsistent
Tracker CAN see the shroud visit his target if his target doesn't visit
Plaguebearer DOES infect a shroud who shrouds them if they don't visit
Werewolf who used track scent on a shroud CAN'T see the shroud visit his target even if his target doesn't visit
Warlock CAN'T see the shroud visit his target even if his target doesn't visit
Lookout CAN'T see the shroud visit his target even if his target doesn't visit
Veteran CAN kill a shroud who shrouds him while on alert
Werewolf CAN'T kill a shroud who shrouds them if the werewolf doesn't visit