How to Fix a Godot Animation Not Looping Because Start and End Keys Differ

Your idle animation visibly hitches once per loop. The last keyframe sits at a slightly different value than the first, so the wrap creates a jump. Aligning the end and start keys produces a clean loop.

How to fix it

1. Match end key to start key

Copy the value of the first keyframe to the last keyframe (or delete the last key so the loop wraps directly to the first) so there is no discontinuity at the loop point.

2. Set loop mode on the animation

In the Animation panel set the loop icon / loop_mode to LOOP_LINEAR so the player interpolates across the wrap instead of cutting on the last frame.

3. Check interpolation at the wrap

Ensure the track uses continuous interpolation and that no easing on the last segment causes a velocity spike when the time wraps from end back to start.

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 Godot 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.