Quick answer: Detect the wall with reliable side rays, briefly lock movement toward the wall after a wall jump, and read the jump input cleanly so it fires off the wall.
A broken wall jump is usually wall detection or input re-gripping. Fixing both makes it reliable. Here is how.
How to fix it
1. Detect the wall reliably
Use side rays or overlap checks at the right height and length to confirm the player is against a wall. Flaky detection means the wall jump sometimes does not trigger.
2. Lock movement briefly after the jump
After a wall jump, briefly ignore input pushing back into the wall so the player actually leaves it. Without this, holding toward the wall re-grips it and the player sticks instead of jumping away.
3. Read the jump input cleanly
Use a per-press jump input so the wall jump fires once on press. Confirm the input is not consumed by another system, and that the wall-jump state allows it.
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.
Reproduce it once with full context and the fix writes itself. The hunt is the expensive part.