@Walf@ZWO I have made a new test:
I connect all my elements (ZWO cameras, EAF, filter,...) to the Pegasus hub except the CGEM ii Mount. All is switch on except Asiair. I switch on the mount, initialize it without the micro-usb link. Hence, I connect the output of the Pegasus hub to the USB 3.0 Asiair port. I put the USB link between the CGEM ii hand controller & the Asiair. The Asiair is always switch Off.
I switch ON the Asiair, open the Android tablet, the setup is OK, all devices are recognized by the Asiair. I could switch off & switch on again the mount.
If I switched off the Mount, and I disconnect the HC USB link from the Asiair & I connect it to the Pegasus Hub, I switch ON the mount in the Asiair user interface, it's OK. So for me, the issue come from a COM number issue. I think that the CGEM HC use old circuit, and the COM number are fixed (3 & 5 for me) and if the COM value is different, it generates unconnected state.
I have not received answer about this issue. Thanks for your reply.