Well my intention was to wait for the survivors to be in place then you only scan them while protecting them from the zombies, I did move and scan while playing the game too lol, but I quickly abandon that thought and wait for the survivors to stand still then I only scan them. So I assumed that most player would also have the same behaviour like me, but I guess that was not the case. Maybe I should try out something to address this issue post-jam.
Anyways thank you for the feedback!