Setting the Jira macro display columns to "Priority,Key,Summary,Assignee,Description,Due" produces a display which is blank on all columns except the key.

Replacing with "priority,key,summary,assignee,description,due" restores the display.

This is a problem that appeared with an upgrade. The macro worked in 3.X with capitalizations but has produced a lot of bad pages in v5.1. Ability to enter capitals allows them to be copied from actual Jira pages where they are capitalized.

Friendlier behaviour would be to either always allow caps or to lowercase the column list when the macro data is saved...