I am using JIRA version v8.5.9, where I am running the following query in its search option.
issuetype = "Sub task" AND assigned == 'xyz' and summary = '16.4'
Where xyz is a user. Basically what I am trying to achieve is: I am looking for all stories, sub-tasks whose assignee is xyz user along with its summary should contain 16.4 in it. When I am running this query it's not giving me any results. Any help is greatly appreciated.