I went for and got an internal job. Same general department but very different role, different job title, different management chain etc. My previous role was one where recruitment is a (national) issue and we had some people unexpectedly leave, so before I went my manager and their seniors were trying to negotiate me taking certain pieces of work with me because they hadn't manage to fill my post. I had to put my foot down not to, and tbh I think the only reason it was accepted was due to a combination of me taking annual leave and having some external training days in my induction which meant I physically wasn't there to do what would be needed.
I'm two weeks into my new job and my old manager keeps emailing me and copying in my new manager with requests for me to do things relating to my old job, eg to take part in meetings so I can be there to explain projects etc.
My previous job is one where working unpaid overtime isn't unusual, and before I finished I worked excessive hours for weeks, so that I could tie up as many loose ends as possible and provide very detailed handovers. I know (from seeing other staff coming and going) that I went further than most in doing so. I feel a bit of a victim of my own success, if I'd done a worse job they wouldn't be asking!
The requests are coming due to a combination of my job not being filled and work I had been in charge of being handed over to staff who don't really have the time, so it's an easier thing for the manager just to think 'oh we'll get pakka on it as they know it so well' and other (senior) people agreeing because with my knowledge, I'm the 'best person for it'. There is a degree of risk/impact to the public if things aren't done properly.
The AIBU part is that my new job can allow me the time to do it, because the new job is a slower pace (currently, will ramp up) and my new boss is accommodating. So in theory I'm in the same company, we're all ultimately working to the same goal, and they can allow me the time without feeling too pressured. However, mentally I wanted to make a clean break and I'm feeling resentful that these requests are coming. I left my job for a reason. The requests are worded in a way that I don't get the impression I can say no (Hi X we need Pakka to do Y, I can see they're free on that date...) . Also I feel like the slower pace of new job should be for me to enjoy when I start, not to be filled in to help out my old team.
I can't decide whether I should suck it up for the sake of professionalism/workplace relationships, or whether I should push back on it, or if this risks sounding petty.
AIBU to be annoyed and consider pushing back against this?