Problem with USB HostShield with Bluetooth Dongle (Local Bluetooth Address is empty)

System configuration:

  • Arduino UNO (Arduino IDE version 1.8.15)
  • USB HostShield (used with USB Host Shield Library 2.0 version 1.6.0)
  • Several USB Bluetooth Dongle (different manufacturers)

Sketch:
"PS3BT" from "USB Host Shield Library 2.0 Example.
"#define DEBUG_USB_HOST" added to "message.h" because otherwise only "PS3 Bluetooth Library Started" was output.

Problem:
PS3BT no "PS3 Bluetooth Library Started" shows address for no BT adapter.
Output:
PS3 Bluetooth Library Started
Bluetooth Dongle Initialized
HCI Reset complete
Write class of device
Local Bluetooth Address: :::::
Wait For Incoming Connection Request

Remark:
PS3USB works without problems.

Does anyone have an idea where the error is?