Quick answer: Add an explicit empty entry to the weighted table so the no-drop outcome participates in the same single weighted draw as the items.
If enemies always drop something despite a 40 percent no-drop chance, the empty outcome is not in the draw. Add it as a real entry. Here is how.
How to fix it
1. Add an explicit empty entry
Represent no-drop as a real entry in the loot table with its own weight, so it competes in the same weighted selection as every item rather than being implied leftover.
2. Include it in the total weight
Sum the empty entry's weight into the total used for the random draw, so the selection range actually covers the no-drop band and can land in it.
3. Handle the empty result
When the draw lands on the empty entry, produce no item gracefully, rather than falling through to a default item because the loop assumed a real entry.
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.
A crash you can name from its stack trace is a crash you can usually fix in minutes.