This seems similar to this: Can't connect to midi hub - #26 by Jason_Canning
There were 2 devices getting assigned the same COM number by Windows OS. Please go through the information in the linked thread and see if the same steps help fix the situation.
You should be looking at how Midihub is getting enumerated while it is in Bootloader mode (all LEDs are on). It may help to enable ‘View → Show hidden devices’ in the Device Manager.
You may as well post a screenshot of how Midihub appears in the Device Manager while it’s in Bootloader mode on your system, under Ports (COM & LPT) section.