MDK 5.17, Middleware 7.0.0 USB Device reconnect Problem

USB device example for XMC4500 does only run once:
Configuration: unchaged from Example-Project + Self-Powered
Example: MSC, HID on XM4500 RelaxKit
Effect: after reset detection works well and HID or MSC can be accessed.
After unpluggin and replugging the device (cont. power) the HID and MSC is not detected anymore by any PC (Win10-64, Win7-64).
Is there any sequence available to detect and reconnect the USB device?

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