In Service Portal, empty/blank box appears inside List collectorDescriptionIn the service portal, if an empty box showing up in the list collector field, this means any empty character is passed in the field via client script/UI policies via setValue().CauseAs shown in the below screenshot, if you observe an empty box in the list collector field of the service portal. It means your client script is using a space character to set the value. ResolutionIdentify the client script(s) used to set the value for the list collector variable You'll observe the g_form.setValue() as below g_form.setValue('affected_varibale_name',' '); Remove the empty space used it the setValue() and this will fix the issue g_form.setValue('affected_varibale_name','');