MRP Postpone Messages not going away after answering

After planners answer the postpone suggestion and after MRP runs overnight, the postpone message does not go away (Time phased and Planner Workbench still have the suggestion on it).

This only happens with some parts, initially it appears that it is subcomponents

I noticed that the MRP Scheduled Date on Part Maintenance>Plant>List has not been update for these parts - should this be updating with every MRP run?