I assume it’s a limitation of Intiface, not the scriptplayer.
I have the same behavior with Intiface, but when I use the Scriptplayer and connect to the handy directly it works as it should. As far as I can tell.
The current pre-release updated the handy Api to v3 so it only works with the Handy 4.x Firmware. See here: Handy FW4 Support for ScriptPlayer