Quick answer: Send lightweight keepalive heartbeats on a timer that runs independently of gameplay, including during loading and pause states.

Many transports drop a connection that sends nothing for a few seconds. A client stuck on a heavy load screen produces no traffic, so the server's idle timeout disconnects it just as it finishes loading.

How to fix it

1. Run heartbeats on an independent timer

Send a tiny keepalive packet on a fixed interval driven by a timer that keeps ticking during loads and pauses, not by the gameplay loop which is stalled.

2. Send a loading status to the server

Have the client notify the server it is loading so the server can extend or suspend the timeout for that peer until it reports ready.

3. Tune timeout to worst-case load

Set the idle timeout comfortably above your slowest expected load and asset-stream time so legitimate clients are never cut off mid-load.

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.