My shift got changed again with no warning, and I am pretty sure the contract says they cannot do that. But I do not know if this is a real grievance or if I would just be making noise over nothing. My rep is right there in the break room, and I still cannot tell when it is worth walking over to him.
More people experience this than they realize.
You have a union but do not know when a problem is worth filing or asking your rep.
If this sounds familiar, the Library can help you find the bigger picture.