Following the release of the Edge OS V5.0.11 and the subsequent service packs in 2022, the support of Edge OS V4.x has been discontinued for all Edge OS-based device types, such as the X300 on April 31st, 2023. To receive support for the X300 and applications, it is required to update to OS 5.X.
The LED behavior may change according to the OS version. For further details, see Connect X300 Data sheet, https://siemens.com/bt/download → ID: A6V11473182.