Can't adjust metric?

I’m trying to get the Cellular to not be the highest metric, but every time I lower the metric on the cellular connection it is either modified back, or the modem resets and I get a new interface name and that sets it’s metric back.

How do I tell it to prioritize the WLAN instead of cellular?

I have been having this same issue. No matter how many times I send network interface priority to the core software (which is says it has received) it will not release usb0 as the priority interface. Even manually trying to switch metrics doesn’t work. At a loss here as well.