ExpressLRS 4 switch arming method does not work

[wimalopaan]

An ELRS module version 4 enables the new switch based arming method. Openix6 detects an ELRS v4 correctly and brings up the corresponding dialog in model setup. But using a switch like SA or permently "On" to arm does not set the module into armed mode. Starting the ELRS-app does not show the armed state as it would with CH5 method.