Quick answer: Godot 4 Tween with TRANS_CUBIC EASE_OUT briefly overshooting the target value? Curve is mostly continuous but final approach can micro-overshoot - use TRANS_QUART or clamp.
Position tween to 100 with cubic out; final value momentarily reads 100.02.
Use TRANS_QUART
Less overshoot tendency than cubic. Similar visual feel.
Or clamp in callback
tween_method with explicit clamp. Defensive.
Test overshoot behavior
Author tween; log final value; verify expected.
“Easing curves can overshoot. Choose deliberately.”
If micro-overshoot matters in your project (e.g., physics-coupled), the cubic-vs-quart audit is one-time.