Suddenly users of specific user group not able to assign issues to different users of the project which they could able to do it previously. Other group users which has "assignable user" as well as "assign issues" still could able to assign.
I have checked the project permissions has both "assignable user" as well as "assign issues" permission for project. Users of this group are part of jira-software-users group which has browser user and group permission
Please advise on what would be my next steps to resolve this.