Are you using an iPhone? If so, how is your Audio Routing set in Settings, Accessibility, Hearing Devices, Audio Routing. You might try the Automatic option rather than the Always Hearing Devices routing option if that’s what you’re currently set on.
I’m surprised that phone calls are still routed to your HA’s. At least for an iPhone, the Quattros are not fully on when being charged (try changing or even accessing HA programs via the Smart 3D app when the aids are in the charger, for instance).
The HA’s being “on” when being charged is a FEATURE and not a BUG. For instance, in the Smart 3D app you can read the state of charge of each HA whereas the charger case only shows the status of the HA that has the lowest charge. Also, unlike aids with disposable batteries where you have to open and close the battery doors of each aid in succession, to reboot a ReSound rechargeable all you have to do is place the aids SIMULTANEOUSLY in the charger until the LEDs start blinking, then remove them. That feature is very handy for pairing or if one is a DIY’er, to reboot the aids to connect to a Noahlink Wireless device.