How can I automatically add Watchers to Bugs in Jira Cloud on moving issue from one project to ano?

[MariiaBoikoDigi]

Dear Jira guru, I've managed to setup automatic watchers adding on creating an issue, thank you for all the comments here. 

But I'm struggling with the next problem:

• issue is created in a project where I don't need the watchers
• when move the issue to the project where I want to add the watchers the dummy watchers field is filled properly, but real watcher are not updated

Any ideas are highly appreciated.

[Taranjeet Singh]

@MariiaBoikoDigi What does the real "Watchers" field show in your target project when you move this issue?

[MariiaBoikoDigi]

@Taranjeet Singh  It shows creator, basically it stays without changes after moving, in other words users from the dummy fields are not applied