Reference field is showing sys id instead of label name in service portal

[Koel Goswami]

I have one reference field and when I am modifying the widget and trying to show it on service portal , it is showing sys id instead of the display name. But I want display value.How to achieve this?

[Koel Goswami]

Whenever I am using c.server.update()  in client controller then in service portal it is running infinite times and crashing the site