Quick answer: Raise and handle objective-completion events reliably, re-evaluate quest conditions when relevant state changes, and persist quest progress so it survives saves.
A quest that does not update is usually a missing event or condition check. Wiring them fixes it. Here is how.
How to fix it
1. Raise and handle completion events
When an objective is met (an item collected, an enemy killed), raise an event the quest system listens for. If the event is not raised or not handled, the quest never learns the step is done.
2. Re-evaluate on state change
Check quest conditions when the relevant state changes, not only at fixed moments. A condition evaluated too rarely or at the wrong time misses the completion. Tie evaluation to the events that matter.
3. Persist quest progress
Save quest state so progress survives reloads. A quest that updates at runtime but is not saved resets on load, looking like it failed to update.
Catching the ones you can't reproduce
The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.
Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.
This is where a tool like Bugnet earns its place. Its SDK captures every error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.
Most of the time the fix is small. Seeing the failure clearly is the part that actually costs you.