Change usb port, uninstall any Lumia / Nolkia usb comm device from system -> device list, than unplug , replug and wait for new drivers to be installed.
It happened only on certain devices in same case
That's not a phone bug, but a random pc connectivity iussue. Simply it doesn't recognize the phone as a new device
Going to have to disagree with you. On my Primary desktop, I tried USB 2.0, USB 3.0 and USB 3.1 ports on it, still the same results. Even tried it at my work laptop, USB 3.0 ports, tried all 3 on this machine and the same result.
The Phone will show "slow charging" (even though my USB 3.1 ports support Quick charge), no drive will show up, or nothing in the device manager.
The phone is going in a charge only mode, is there a **new** setting someplace to change this ? (Android devices have this option, a sync, charge and another option when connecting via usb)
Maybe not for you but, it's a BUG or a setting someplace.... Anyone know for sure ?
Edit: To be 100% sure, I removed ALL Nokia drivers from (programs and features) Windows and rebooted, same result (no applications made by Nokia are installed)