How to Fix a Tab Control Showing Two Panels After Fast Switching

Clicking quickly between tabs leaves two content panels stacked on screen because hides and shows race. Here is how to fix it.

How to fix it

1. Hide all, then show one

On tab change, synchronously hide every panel (or set the inactive class) before revealing the selected one, so there is never more than one active.

2. Cancel in-flight transitions

If a panel is mid-animation when the tab changes, cancel that transition rather than letting it finish and re-show a panel you just left.

3. Track active by a single index

Drive visibility from one activeIndex value and derive each panel's visibility from it, instead of toggling panels independently on each click.

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 HTML5 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.