How to Fix a Unity TMP_Dropdown Not Showing Its Options on Click

Clicking a TMP dropdown should reveal its options, but a broken template makes it open empty or hidden behind the panel. Fixing the template's sizing and the canvas sort order restores the option list.

How to fix it

1. Configure the Template

Expand the dropdown, confirm the Template child is assigned and that its Item has a sized RectTransform and a TMP label, since a zero-height item produces an empty popup.

2. Fix draw order

Put the dropdown on a canvas with a high sort order or move it last in the hierarchy so the spawned list renders on top of panels instead of behind them.

3. Verify raycasting

Ensure the canvas has a GraphicRaycaster and the EventSystem exists, and that no full-screen image with Raycast Target enabled sits over the dropdown swallowing the 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 Unity 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.