@RJDan Do you have another phone to test if it has the same behavior. I think it also depends on the hub/adapter. If I remember correctly, mine usually reconnects when I disconnect the power while the display is connected.
I'm tinker with mine and see how they behave. I have a few adapters/hubs.
I don't use mine frequently but when I test it for extender period of time, I don't experience unexpected disconnections.