Extension kit

I previously had the TADO thermostat working fine wired into my boiler. I replaced it with the extension kit so that I could fit the thermostat into another room. All devises are showing connected on my app but when I try and change the temperature it’s not changing the boiler. I contacted TADO and they said they would update the firmware. Anyone know how longs this takes and if there is any other reason the extension kit isn’t working?
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