Quick answer: Add an allocation timeout that, on failure, releases the match and requeues the players automatically instead of leaving them stuck.
Matchmaking has two phases: forming a match and allocating a server for it. If allocation fails (capacity exhausted, region down) and nothing times it out, players are matched but never placed and wait forever.
How to fix it
1. Time out the allocation phase
Bound how long a formed match waits for a server (e.g. 30 s). On expiry, tear down the match attempt rather than leaving tickets pinned to a server that will never come.
2. Requeue players on failure
When allocation fails or times out, automatically return the players to the queue with their original priority so they re-match quickly instead of starting over manually.
3. Provision capacity ahead of demand
Keep a warm pool of standby servers and scale on queue depth so allocation rarely fails in the first place, reducing how often the timeout path is hit.
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.
The errors you never hear about are the ones quietly costing you players. Visibility turns them into a worklist.