I've received this feedback from the support desk about this behavior:
I have reviewed this ticket and actually this is an expected behavior in JIRA 5.0 and above. The reason behind this is to improve the performance by limiting the search using text suggestion. Returning all user with assignable user permission can cause a performance issue especially when the Instance having a large user base.
Unfortunately, you can not revert back the changes without modifying the source code which is not supported by Atlassian. I hope this clarifies your inquiry and please let us know if you have further question regarding this.
Atlassian Summit is an excellent opportunity for in-person support, training, and networking.Learn more
Hello! I'm Rayen, a product manager at Atlassian. My team and I are working hard to improve the trial experience for Jira Software Cloud. We are interested in talking to 20 people planning t...
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