Allow individual room TRV to open zone valve for that circuit
When installing Tado, I replaced my wired thermostats in hall and landing that controlled downstairs and upstairs zone valves with Tado thermostats. The Tado thermostats now control the zone valves via the Extension kit.
Most of my rooms have Tado TVRs, however, for a room on either circuit to receive heat, the corresponding zone valve must be open. The zone valves are wired to my oil fired boiler and when they open they trigger the boiler.
If only one room on a circuit needs to be heated in a zone, the appropriate Tado thermostat needs to be set at a sufficiently high temperature to open the zone valve. This often forces me to set the hall and/or landing thermostat to a higher temperature in order to open the zone valve.
Each TVR, when calling for heat, should be able to open the appropriate zone valve long enough to enable that room to be heated. Once the TVRs determine the rooms have reached the required temperature, and unless the hall and/or landing thermostats are calling for heat, should be capable of closing the zone valve for that circuit.