Quick answer: Confirm the input backend and mappings are set for the build, ensure the window has focus, and test input in a development build to find the difference.

Input that works in the editor but not the build is an input-config or focus difference. Here is how to fix it.

How to fix it

1. Check input settings for the build

The build may use a different input backend or mappings than the editor. Confirm the active input handling and action mappings are configured so they apply in the built game, not just the editor.

2. Ensure window focus

A build window without focus receives no input. Make sure the window is focused on launch, and handle focus changes, so input is not silently dropped because the window is not active.

3. Test a development build

Editor-only input behavior hides build differences. Test input in a development build with logging so you can see whether events arrive and where the editor-versus-build difference lies.

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.