Quick answer: Drive the overlay's visibility directly from the saved setting, both when the setting changes and on startup, so the counter appears only when enabled.
A player disables the FPS counter but the number stays in the corner. The toggle wrote a flag that the draw code ignores. Bind visibility to the flag and apply it immediately and on load.
How to fix it
1. Bind visibility to the flag
Set the overlay node's visible (or skip the draw) based on the setting value every time it changes, not just store a variable the renderer never checks.
2. Apply on startup too
Read the saved value at boot and set the overlay's initial visibility, otherwise it shows until the player opens the menu and toggles it twice.
3. Keep it cheap when off
When hidden, skip the per-frame text formatting and update entirely so a disabled counter costs nothing.
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.
Ship the fix, watch the signature disappear from the next build. That's how you know it's really gone.