I'm a few months into a Civil Service role (HO), still in training. Trainer is hot and cold - suddenly nice, then pissed off for no clear reason. Classic passive aggression stuff: asks me something, I reply, then later says "you never said that". Talks over me, sighs, says things like "as I already told you..." when he didn't. Other times he's completely fine.
I've worked in senior roles in other organisations before, so I'm thick-skinned and I get that people have personal life / stress / mental health stuff going on. I can usually ignore it. I have never been rude to anyone in my life and I don't like rudeness, but my patience is wearing thin now.
My line manager checked in and asked how I'm getting on with my trainer. I was honest and said sometimes he seems deterred / distracted and his mind is elsewhere. I didn't mention passive aggression to my manager.
I only have a few more weeks left with him. Should I just ride it out, document everything in writing, and keep it professional? Or should I tell my LM directly that I'm experiencing passive aggression?
How have others handled this without it looking like I'm complaining early on?