There are a couple of people at work who are making me feel quite anxious. One of the situations is that someone had a promotion blocked, for good reason, and is gone in a massive sulk about it. She is now trying to encourage other people to work to rule, including people who I line manage. I don't think she's been particularly successful with the people I manage but I suspect she has been with others.
It's one of those situations where I know about it but can't address it directly because I've been told things in confidence.
In similar situations how have you managed to deal with this type of thing and stay calm and not let it affect your mental health? It's leading to feelings of paranoia.