Red flag?

My boyfriend and I have only been dating a couple weeks. We work together. I am friends with a lot of people there and work overnights. My boyfriend works evenings and is friendly but more reserved. Anyways, he has an issue with one of the managers who work evenings and I am friends with him too. I honestly don’t know what to think of their issues. I feel like I can see both sides at some points. For example, months ago, my boyfriend had left early because he butted heads with him and he was upset, which shorted them. The manager told me he had to speak to another manager to be allowed back. But I also know that management does treat him poorly, this friend included. (For those wondering why he is still a friend, he was supportive during being abused, so I have a hard time viewing him bad). So I try to just not get involved. Which is probably bad, idk. It came back up today because they worked together and my boyfriend texted me saying something happened and he clocked out and wanted space. Then we were on the phone later and I felt he avoided telling me what happened and kept details to a heavy minimum. Which seemed weird but I figured it wasn’t my problem. Then he told me when he apologized, he mentioned having bipolar, which he told me was in question, so I thought was weird. So I called him out. He said that it is in question bc he’s now in therapy and psychiatry but he mentioned it at the time because he felt it would him to management that he falls under a certain protected category.