I installed the Behavior Plugin, created a marketing group, then changed a custome field to be read only and made an exception for the marketing group. This works for newly created bugs. However, when viewing an existing bug, not even the marketing group can change this field. The field is displayed along with the others but when hovering over the field it does not show the pencil edit icon, instead it says "inline edit disabled". Why can't the people in the marketing group edit this field?