How do I catch this when it only happens for some players?

Capture it automatically from the player's device with the full stack trace, the device and OS, the build, and a breadcrumb trail of what they did. That turns a vague complaint into a specific, reproducible issue you can fix without owning the hardware it happens on.

How to Fix Remote Config Using the Stale Default Before Fetch Completes

Q: What causes remote config using the stale default before fetch completes?

Your code reads a config value synchronously at startup before the asynchronous fetch has returned, so the first session always sees the compiled-in default rather than the server value.

Quick answer: Set sensible in-app defaults, await the fetch-and-activate before reading values that gate first-session behavior, and use the cached last-known values to bridge the gap.

A first-time player gets the default difficulty because your fetch had not finished when you read the value. Awaiting fetch, or relying on the last cached config, fixes the stale-default race.

How to fix it

1. Set in-app defaults

Provide reasonable setDefaultsAsync values so the game is playable before any fetch, but treat them as a fallback, not the source of truth.

2. Await fetch for gated features

For values that decide first-session experience, await fetchAndActivate behind a short loading state rather than reading them synchronously at boot.

3. Use the last cached config

On launch, activate the previously cached values immediately so returning players get recent server values instantly while a fresh fetch runs.

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 mobile 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.