We took a quick look at the situation, and it seems that these devices initially report “I have RMS measurements" prompting Homey to start listening to those RMS clusters. However, later on, the device begins reporting to different clusters, leaving the RMS cluster as undefined.
Example voltage: 233100,
Example activeCurrent: 46,
Example activePower: 4945,
Example rmsVoltage: undefined,
Example rmsCurrent: undefined,
Example rmsPower: undefined,
Keep y’all posted!