Hi everyone. I have a warehouse job that I enjoy. At least I used to. My position had 3 employees and everyone did a fair share of tasks.

Up until a month ago. One of the employees quit (found a higher paying job) and the other one stopped doing about half of his responsibilities. This other person has now decided that certain tasks he no longer wants to do are MY responsibility even though we are the same position. He routinely puts things in wrong locations or moves them from proper locations to wherever he wants. (Creating more work for me.) On any given day, he can be seen around the facility sitting in a chair chatting with other employees. He also likes to leave passive aggressive notes around my workstation about little things I don't do right. Our supervisor doesn't want to intervene. We are all in a labor union and he is related to a supervisor.

I really like the job and environment other than this problem employee. Do I try to talk with HR or cut my losses and look elsewhere?