"no matches found" when editing "Request participants" on Jira Software

Question

So we have Jira Software, and I just enabled the custom field "Request participants" in some of my issues in order to have given users to receive a notification when given tickets are closed (without using plugins).

Now the problem is that whatever I type in the field "request participants" it always returns "no matches found", regardless if I write the name of other user existing for the same project.

Do you know why does this happen and how can I fix it?  
I read somewhere that this is a programmatical field, but in that case, how can I customize its values?

I also read it is only used for Jira Service Desk, but then why do I have the option to add it in Jira Software? doesn't make much sense for me.

Thank you

Alvaro Munoz · Answer

Hi Martyn,

It doesn't change, but depending on the issue I want to notify to a different user. I don't want all of them to get notified for issues that they don't care... :/

Marty_yvf6sb · Answer

Hi Alvaro,

Does the group of users you want to notify on Issue Close change very often?

If not, and you are using a Classic Project you could try creating a specific group and then modifying your Notification Scheme: https://confluence.atlassian.com/adminjiracloud/creating-a-notification-scheme-776636401.html

I hope that helps!

Alvaro Munoz · Answer

Thanks for the response, 
any idea how can I achieve what I want without using plugins then?  :/