It's really frustrating, maybe it isn't done deliberately but it's a little cheeky. Maybe these people are angling to move up to a management role and think they're proving they have what it takes.
I have only worked with a particular colleague 3 shifts. The very first shift she was actually new to the role and it was up to me to show her what we do on the shift, which hopefully I did in a friendly way.
A few days later i came on shift with her and suddenly she was telling me "Right so first we'll do this, this and that and then later on we'll do this."
I was really surprised, and she tried to do it again on the second shift. Not even saying, "shall we do X or X", just telling me what we will do and in what order.
It's a job which requires teamwork, but I was taken aback by it. On the 3rd shift I tried to assert myself more by saying, "Well actually I'm going to have a break first, then afterwards I'll do X job."
Has anyone else had this and how do you deal with it? I think as I'm quite quiet they probably suss me out as a soft touch and think they can get away with it, I've had it in previous jobs too.