delay in sending a notification/message to alexa device or server

[Chavell3]

I'm experiencing an issue with my flow and the alexa plugin having some delay, sending a message or more a sound. That delay could take 10 to15sec sometimes even 30sec until the command is finally send to the device and it could also happen that the message is not send at all to the device. Sometimes it also happens that 1 device is playing the sound instantly but the other has a lag of 10 - 30sec.

The Flow is general is, that first the sound volume is increased and after a delay of 2 sec(from the Doorbell ring) the sound should be played on 2 alexa devices. After a 4sec delay the volume decreased again.

What can I do, to qualify what the issue of that is?

I played a little bit because I thought maybe the "increase volume" command and "routine sound" will be send to short after the other and generate that issue... but even if I move everything behind the "routine volume" the issue is still the same.
But as you see "sending" the message it is still hanging...

has anybody an idea what that issue could be?