Quick answer: Disable NavMeshAgent.updateRotation when the AI needs to aim, and let your combat code own facing; re-enable it for pure movement, or blend the two deliberately.
A Unity enemy whose head snaps between its movement direction and the player while shooting has the NavMeshAgent and aim code both writing rotation. Giving one system ownership fixes the snapping. Here is how.
How to fix it
1. Disable agent rotation when aiming
Set agent.updateRotation = false while the AI is aiming or attacking, so your combat code can rotate the transform toward the target without the agent overwriting it.
2. Re-enable for travel
Turn updateRotation back on when the AI is just traveling and not engaging, so it faces its path naturally during movement.
3. Blend facing intentionally
If the AI must move and aim at once, compute one final desired rotation per frame (path direction blended toward target) and apply it once, rather than letting two systems both write rotation.
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 Unity 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.
A crash you can name from its stack trace is a crash you can usually fix in minutes.