I think you need to define "synchronise", as there's a couple of questions about this.
Do you mean "copy values"?
You also ask about "between different types of linked issues". Field data lives on issues themselves, not type or link, so I'm a little confused about the actual goal here.
I don't think there's any free add-ons to do any of the cases I'm thinking it might be though. If you could help me understand what I've missed, there might be something, but my instincts are that you're going to need one of the flexible add-ons, probably not a free one.
In the past, Portfolio for Jira required a high degree of detail–foresight that was unrealistic for many businesses to have–in order to produce a reliable long-term roadmap. We're tur...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs