According to my previous comment, I changed the interface, after which all Signal messages appeared in the process.
But in the process there is no form for sending messages to Signal.
And more.
A real client wrote on Signal. A process was created without his phone. Then, for each of his messages, a new process was created without the phone. I started a process with his phone, hoping that further messages would go into this process, but still new processes were created for each message
http://prntscr.com/NpajxKXKCB8KHere is the client card I created by hand
https://drukaryk.1b.app/app/contact/44424/