How to Fix a Leaderboard Showing Stale Cached Entries

A player submits a top score, the leaderboard still shows the old order because it was cached for an hour, and they assume the submit failed. Invalidating or short-TTLing the read fixes the stale view.

How to fix it

1. Shorten or bust the cache

Serve leaderboard reads with a short TTL or append a cache-busting parameter after a write so the next fetch reflects the new score.

2. Show optimistic local rank

Immediately render the player's new score in their slot while the authoritative refresh is in flight, then reconcile when it returns.

3. Invalidate on write

If you use a CDN or edge cache, purge or tag-invalidate the affected leaderboard key when a score is accepted rather than relying on TTL alone.

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 HTML5 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.