I'm starting to be convinced the port is fundamentally flawed, dongles with multiple ports are never reliable enough to keep a drive mounted for any heavy work, HDMI glitches out. Doesn't matter what dongle I try they all have some sort of thing wrong with them.
The only dongle that works reliably enough to do light video editing with a drive is the $20 Apple single USB-C to A adapter, which converts one of your single USB-C ports to a single USB-A port.
The fact that Apple hasn't released a usb-c hub speaks volumes, lets be honest they could charge $500 for it and people would still defend and buy it. But I feel the reason they haven't it because the technology fundamentally doesn't deliver on this promise and it would be just as unreliable as the 3rd party ones.