Just interested in some other perspectives on what would be an acceptable way to handle this in your workplace.
I'm a project manager, x is in a junior admin position. X used to hold a slightly more senior role (not management) but threatened redundancy, took the admin role rather than leave.
Every time I communicate a project decision to x (that has been ratified by the project stakeholders, steering group etc) and ask them to help with the resulting action, for example by sending out a calendar invite, they challenge the strategy behind it and end up pulling loads of different people into the conversation to try to support their case against whatever approach we're taking with the project. The only reason I tell them anything about the project is because I need them to do the occasional task like book an event or send out an email. They'll then refuse to do the work until I've had multiple conversations with them, and all the other people they've pulled into the situation who aren't even part of the project, to clarify that the decision has already been assessed by people with the relevant expertise, signed off, and the thing I've asked them to do now just needs to happen.
For context, I work in an organisation where everyone's in the trade union and the organisation is extremely averse to the risk of upsetting anyone. If I did say anything more assertive than what I've put above, x would probably go to the union saying something about their wellbeing being compromised then I'd be the one having to justify my actions to HR etc.
How would this play out in your workplace?