2x MSZ-GE25VAD2 - one of them works fine, the other will only turn off

[nick-robinson-invenco]

Have two identical MSZ-GE25VAD2 aircon units - one works fine, the other can only be turned off with SmartIr. Same model remote as well. Any ideas?

Home Assistant version
2024.3.3

SmartIR version
1.17.9

SmartIR configuration

 - platform: smartir
    name: Master AC
    unique_id: master_ac
    device_code: 1135
    controller_data: remote.master_ir_blaster
#    temperature_sensor: sensor.temperature
#    humidity_sensor: sensor.humidity
#    power_sensor: binary_sensor.ac_power


  - platform: smartir
    name: Bedroom AC
    unique_id: bedroom_ac
    device_code: 1135
    controller_data: remote.bedroom_1ir_blaster
#    temperature_sensor: sensor.temperature
#    humidity_sensor: sensor.humidity
#    power_sensor: binary_sensor.ac_power

Describe the bug

Only Power off works on one of these units - none of the other functions