MQTT keep alive does not change from 30 seconds

    Hello!

    I have a Shelly1 and also a Shelly PlugS and use them with MQTT enabled which works well. he only thing which I am not able to change is the keep alive period. I always get keep alive messages every 30 seconds no matter what is set 15, 60 or 120 seconds.

    I have the versions Shelly1: 20211109-124958/v1.11.7-g682a0db

    Shelly PlugS: 20190516-073020/master@ea1b23db

    Is this a bug?

    Greetings from Vienna,

    Crisu