When doing a bulk edit on a custom field a re-index is required for filtering to work properly.

To duplicate:
1. Set up a filter on some custom field that will match some issues.
2. Bulk edit those issues such that the filter should show nothing.
3. Return to the filter.

Expected behavior:
No issues shown.

Actual behavoir:
The issues will still be shown and if the custom field is displayed in the issue list it will show the new value. Then do a re-index of the issues and return to the filter. Now nothing will be displayed.