Hello!
I have made a custom field with the type "single user picker". I've made a configuration to get options from the group (which contains 3 person). Everything is good with this field if I use '@' or any character in this field --> all three persons are displayed, but if i don't type anything and only click on the field I have a message "No options".
If I click on Reporter or Assignee field I have a list of users without typing anything and it is very comfortable. So how can I configurate my custom field to work in this manner?