Alert manager app and alarms0

[Daniel]

This is how KNX is designed, when LM sends telegram to a group and there is no knx device on the other end to receive it then by knx standard such telegram will be repeated 4 times as it waits for acknowledge to be sent.
We suggested you several times to not use KNX for communication between LMs but you rejected it each time.
In that case we cannot help you.