I think some of it depends on what the "issue" was that you're trying to move on from. Some times things will be there that you can't move past, sometimes you can. Sometimes it depends on the individual and their history and things like that as to whether they can. While I might be able to put something behind me, you may not because of your own past kwim?

I had a falling out with a friend while I was pg with dd. it's was to the point we didn't talk for 18 months, pretended like we didn't know each other at the shops and all that stuff. Was easier than acknowledging anything. 18 months on we were back to working in the same place and I decided to suck it up and make contact. I was either going to be a case f having it out and then not speaking ever again, or moving forward. We are now closer than ever. So it can happen. But. Won't say it was easy. And we definitely do mention what happened in passing, so it's not something forgotten. But forgiven and moved forward, and not harbouring the resentment, yes.