formula_cooling status seems not work

[QbaF]

One of status part is formula_cooling.

Status:{"ready":true,"heating":false,"keep_warm":false,"cycle_finished":false,"formula_cooling":false,"temperature":67,"onBase":true,"waterlevel":2130,"waterlevelLiters":0.4}

Unfortunatelly it doesn't seems to works in my case. When I turn on this function in iKettle application (I do not find the command to do that via MQTT) the formula_cooling status is still false