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 a Slope Sliding Threshold Letting the Player Slide on Stairs

Q: What causes a slope sliding threshold letting the player slide on stairs?

The slope-slide angle threshold is below the angle of the surfaces the player should stand on, so the controller treats walkable slopes and stair edges as too steep and applies sliding.

Quick answer: Raise the maximum standable slope angle, snap the player to the ground on walkable surfaces, and only apply slide force above the true steepness limit.

A player who slowly slides down a ramp or off a staircase they ought to stand firmly on has a slope threshold set too aggressively. Tuning the angle and adding ground snapping fixes it. Here is how.

How to fix it

1. Raise the standable angle

Set the maximum walkable slope angle above the steepest surface the player should stand on (e.g. 50 degrees), so ramps and stair-step normals are not classified as slide surfaces.

2. Compare against the real ground normal

Use the ground contact normal's angle from up to decide sliding, and average normals across multiple ground rays so a single stair edge does not falsely read as steep.

3. Snap to ground when walkable

On walkable surfaces, snap the character down to the ground each frame so they do not drift or slide on micro-slopes; only apply slide acceleration when the angle truly exceeds the limit.

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.

Ship the fix, watch the signature disappear from the next build. That's how you know it's really gone.