MSC USB Host very slow usb stick recognition

Hi, I'm using a STM32F429 with usb host connected to FS.

Using the official USB MSC Host library from ST (1.24.1 latest one) I have a slow recognition when I insert a USB stick.

The callback USBH_UserProcess with HOST_USER_CLASS_ACTIVE event, so after I can access to USB for read and write, is delayed more than 10 seconds after the HOST_USER_CONNECTION event (this event is rised immediatly with usb connection)

This mean that the application is unusable...

Anyone know the issue or have some suggestions about?

Using another stack (not from ST) in the same hardware the recognition work fine a in less than 2 second I can access to usb.

Thank you

Michele