As a user I find the way some of those bug tracking systems are used infuriating. This seems to happen to me often:
- You submit a bug or find one that's active and comment on it
- there is no activity
- then vendor posts needsinfo
- info posted soon after
- then ignored for while longer
- reassigned
- ignored for while longer
- then closed because release is obsolete, need retesting in new release
This is mostly in RedHat's bug tracker, but elsewhere also.