Everything was going fine when all out of a sudden, my targets page's list of targets went blank.

After trying various things, I was able to get the targets to be shown again. However, the way to do it is out of the normal.

With all the targets being shown in the targets page, clicking the Name header to resort the entries causes the list to go empty again. To get the entries back, I got to change the value for the "Order By Column" to something else, or click some other columns at the list header row.

Has anyone seen this anomaly before? Is there a way to solve this bug?