How to Fix Toast Notifications Overlapping When They Spawn Too Fast

Two events firing close together produce toasts that overlap into an unreadable stack in the corner. They ignore each other's positions. Here is how to fix it.

How to fix it

1. Use a flow container

Append toasts to a fixed-position container with column layout (flex-direction: column; gap) so the browser stacks them automatically instead of overlapping.

2. Queue with a visible cap

Keep a queue and show at most N at a time; when one expires and is removed, promote the next from the queue and let the others reflow up.

3. Animate enter and exit

Animate height or transform on add and remove so toasts slide in and the stack collapses smoothly rather than jumping when one disappears.

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.