For example, API reference (GUI) used to be shown as gui.animate(node, property, to, easing, duration, [delay], [complete_function], [playback]), but now it appears as gui.animate(node, property, to, easing, duration, delay, complete_function, playback).
Apparently, this caused issues with the “Defold Kit” annotations, as the “|nil” option for function parameters has disappeared.