We encountered a performance issue when adding depency items and related items. When I type the issue number it take more than 10 seconds when the suggestion popup appears. We noticed that SQL Server has full CPU load. My points:

1. There is no information obout the progress (e.g. hourglass) so users try to type it again or type it other form (e.g. with project prefix) and it generates another query. It extremelly prolongs the reposnse.
2. Second problem is that it seems to it is not possible to confirm issue number without waiting for the popup. It's stupid because in most of cases you know the number.

I don't know if it is only performance issue on our site, but anyway point no. 2 should be fixed.