Hi Vladimir,
does your process looks like:
When the service task send the message event, the intermediate message catch event can not catch the message event since the activity is not arrived.
There are different ways to prevent it, depending on your use case:
- change the process so that you first wait for the message (e.g. parallel gateway)
- implement a buffering for messages
Please descripte your use case so that I can help you more.
Greetings,
Philipp