One status doesn't show on Manage Board

Question

I have 14 statuses but only 13 show up on may board. Hence, Issues in the missing status don't appear on the board.

Here is the Manage Board view. The missing status is called "QA Initial Passed"

I don't see any problem on the Issue Attributes / View Statuses list. Note that the missing status is on the "Default sub-task QA Workflow" scheme, as is another status that does show:

Finally, as another check, when I filter Issues, I have no problem seeing them. Here is an example:

George Carvill · Accepted Answer

I couldn't wait, so I tried adding a new status. That worked. So I deleted the old one. Doesn't answer the question of why it happened, but it got me through the problem and able to move on.