It appears some scripts that use worked in 1.20, but in 1.21.1 have unexpected behavior or don't work, for example this bespoke preset buttons only work if script is reloaded or filebrowser invoked from main ui beforehand, and this hangs when the script fiddles with onlyShowLatest, if those lines removed it gives behavior similar to previous example, perhaps regression from 1.20.77.4 fix?